Fluid management assembly

ABSTRACT

A fluid management assembly. The fluid management assembly comprises a valve body, a first chamber, a second chamber, a first flow passage, a second flow passage, a third flow passage and a fourth flow passage, wherein the first flow passage, the second flow passage and the third flow passage have openings in an outer wall of the valve body; the valve body is provided with the second chamber, the second flow passage and a first passage; and the first passage can communicate the first chamber and the second chamber. The fluid management assembly is provided with a plurality of channels, the first chamber and the second chamber.

This disclosure is a national phase application of PCT internationalpatent application PCT/CN2020/096757, filed on Jun. 18, 2020, whichclaims the priority of Chinese Patent Application No. 201910549205.8,titled “FLUID MANAGEMENT ASSEMBLY”, filed with the China NationalIntellectual Property Administration on Jun. 24, 2019, which isincorporated herein by reference in its entirety.

FIELD

The present disclosure relates to the technical field of fluidmanagement.

BACKGROUND

Functional components in a thermal management system are connected intoa system by pipelines. The pipeline with a great length may result inthe fluid flow resistance increasing relatively, which is adverse forthe fluid to flow in the system when the thermal management system is inoperation.

SUMMARY

An object according to the present disclosure is to provide a fluidmanagement assembly, which is beneficial of solving the above problems.

In one aspect, a fluid management assembly is provided according to anembodiment of the technical solution of the present disclosure, whichincludes a valve body and a first valve core. The fluid managementassembly further includes a first chamber and a second chamber, a wallforming the second chamber includes an inner wall of the valve body; thefirst valve core is arranged in the first chamber, the first valve coreis rotatable in the first chamber, the first valve core has a conductionpassage, the fluid management assembly includes a throttle chamber, andthe throttle chamber or the conduction passage is configured tocommunicate the first chamber with the second chamber.

The fluid management assembly includes a first flow passage, a secondflow passage, a third flow passage and a fourth flow passage, the firstflow passage, the second flow passage and the third flow passage haveopenings in an outer wall of the valve body, the first flow passage isin communication with the first chamber, and the throttle chamber or theconduction passage is configured to communicate the fourth flow passagewith the first chamber; the second flow passage is in communication withthe second chamber, and the third flow passage is provided with a firstopening of the third flow passage in the wall of the second chamber.

In another aspect, a fluid management assembly is provided according toanother embodiment of the technical solution of the present disclosure,which includes a valve body and a first valve core. The fluid managementassembly includes a first chamber and a second chamber, the valve bodyis provided with the second chamber; the first valve core is arranged inthe first chamber, the first valve core is rotatable in the firstchamber, the fluid management assembly includes a throttle chamber, andthe first chamber is configured to be in communication with the secondchamber through the throttle chamber.

The fluid management assembly includes a first flow passage, a secondflow passage and a third flow passage, the first flow passage is incommunication with the first chamber; the second flow passage is incommunication with the second chamber; the third flow passage isprovided with a first opening of the third flow passage in a wall of thesecond chamber; the third flow passage includes a communication portion,the communication portion is provided with a second opening of the thirdflow passage in an outer wall of the valve body; the fluid managementassembly further includes a throttle portion, and the throttle portionis a part of the third flow passage.

The fluid management assembly includes the valve body, the firstchamber, the second chamber, the first flow passage, the second flowpassage and the third flow passage, the first flow passage, the secondflow passage and the third flow passage have the openings in the outerwall of the valve body, the first chamber is configured to be incommunication with the second chamber through the throttle passage;multiple passages and chambers are provided in the fluid managementassembly, which can relatively reduce pipeline connections betweenfunctional components and is beneficial of relatively reducing the fluidflow resistance.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic three-dimensional structural view of a firstembodiment of a fluid management assembly;

FIG. 2 is a schematic top structural view in FIG. 1;

FIG. 3 is a schematic cross sectional structural view of a firstembodiment taken along line A-A in FIG. 2;

FIG. 4 is a schematic three-dimensional structural view of a planetaryassembly viewed from a first visual angle;

FIG. 5 is a schematic three-dimensional structural view of the planetaryassembly viewed from a second visual angle;

FIG. 6 is a schematic three-dimensional structural view of a first valveseat;

FIG. 7 is a schematic three-dimensional structural view of a firstembodiment of the first valve core;

FIG. 8 is a schematic top view of a first valve core;

FIG. 9 is schematic cross-sectional view taken along line B-B in FIG. 7;

FIG. 10 is a schematic projection view of a first embodiment of athrottle passage and a matching surface of a valve seat in a firstsurface;

FIG. 11 is a schematic projection view of a second embodiment of thethrottle passage and the matching surface of the valve seat in the firstsurface;

FIG. 12 is a schematic three-dimensional structural view of a secondvalve body in FIG. 1;

FIG. 13A is a schematic three-dimensional structural view of a firstvalve body in FIG. 1 viewed from the first visual angle;

FIG. 13B is a schematic three-dimensional structural view of the firstvalve body in FIG. 1 viewed from the second visual angle;

FIG. 14 is a schematic three-dimensional structural view of a checkvalve component;

FIG. 15 is a schematic cross-sectional view of FIG. 14;

FIG. 16 is a schematic view showing the positional relationship of afirst passage, a second chamber, a conduction pipe and a first crosssection;

FIG. 17 is a schematic sectional view of a second embodiment taken alongline A-A in FIG. 2;

FIG. 18 is a schematic sectional view of a third embodiment taken alongline A-A in FIG. 2;

FIG. 19 is a schematic three-dimensional structural view of a secondembodiment of the fluid management assembly;

FIG. 20 is a schematic top structural view of FIG. 19;

FIG. 21 is a schematic cross-sectional view of a first embodiment takenalong line C-C in FIG. 20;

FIG. 22 is a schematic cross-sectional view taken along line F-F in FIG.20;

FIG. 23 is a schematic three-dimensional structural view of a secondvalve body in FIG. 19;

FIG. 24 is a schematic three-dimensional structural view of a firstvalve body in FIG. 19;

FIG. 25 is a schematic top structural view in FIG. 23;

FIG. 26 is a schematic cross-sectional view taken along line D-D in FIG.24;

FIG. 27 is a schematic cross-sectional view of a third embodiment of thefluid management assembly;

FIG. 28 is a schematic cross-sectional view of a fourth embodiment ofthe fluid management assembly;

FIG. 29 is a schematic three-dimensional structural view of a fifthembodiment of the fluid management assembly;

FIG. 30 is a schematic cross-sectional view of FIG. 29;

FIG. 31 is a schematic view showing the connection of a first embodimentof a thermal management system;

FIG. 32 is a schematic view showing the connection of a secondembodiment of the thermal management system;

FIG. 33 is a schematic view showing the connection of a third embodimentof the thermal management system;

FIG. 34 is a schematic operation view of a first heating mode of thethermal management system in FIG. 31;

FIG. 35 is a schematic operation view of a cooling mode of the thermalmanagement system in FIG. 31;

FIG. 36 is a schematic operation view of a second heating mode of thethermal management system in FIG. 31;

FIG. 37 is a schematic operation view of a third heating mode of thethermal management system in FIG. 31;

FIG. 38 is a schematic front structural view in FIG. 1;

FIG. 39 is a schematic cross-sectional view taken along line E-E in FIG.38, inwhich the first valve core is arranged in a third operationposition;

FIG. 40 is a schematic cross-sectional view taken along line E-E in FIG.38, inwhich the first valve core is arranged in a first operationposition;

FIG. 41 is a schematic cross-sectional view taken along line E-E in FIG.38, inwhich the first valve core is arranged in a second operationposition;

FIG. 42 is a schematic cross-sectional view taken along line E-E in FIG.38, inwhich the first valve core is arranged in a fourth operationposition;

FIG. 43 is a schematic three-dimensional view of a first embodiment of avalve bonnet in FIG. 3;

FIG. 44 is a schematic three-dimensional structural view of a secondembodiment of the valve bonnet;

FIG. 45 is a schematic partial enlarged view of FIG. 3;

FIG. 46 is a schematic view showing the connection of the valve bonnetand a first opening portion;

FIG. 47 is a schematic structural view of a second embodiment of thefirst valve core viewed from the first visual angle;

FIG. 48 is a schematic cross-sectional view taken along line D-D in FIG.47;

FIG. 49 is a schematic enlarged view of C portion in FIG. 48; and

FIG. 50 is a schematic structural view of the second embodiment of thefirst valve core viewed from the second visual angle.

DETAILED DESCRIPTION OF THE EMBODIMENTS

A fluid management assembly according to the technical solution of thepresent disclosure may be in many manners, some of which can be appliedto a vehicle thermal management system, and some can be applied to otherthermal management system including a household thermal managementsystem or a commercial thermal management system, etc. A fluidmanagement assembly for vehicles is particularly described withreference to the drawings hereinafter.

Referring to FIGS. 1 to 16 and 38 to 44, a fluid management assembly 10includes a control unit, a transmission device 2000, a valve body 3000and a first valve core 5000. In the technical solution of the presentdisclosure, the control unit is a driving mechanism 1000, and thetransmission device 2000 is arranged between the driving mechanism 1000and the valve body 3000. The driving mechanism 1000 includes a motorunit 1100, a sleeve 1200 and a connecting seat 1300, and one end of theconnecting seat 1300 is fixedly connected to the sleeve 1200 and aconnection between the connecting seat 1300 and the sleeve 1200 issealed. The motor unit 1100 includes a stator 1110, a motor shaft 1130and a rotor 1120, the stator 1110 is sleeved outside the sleeve 1200,the rotor 1120 is fixedly connected to the motor shaft 1130, at leastpart of the rotor 1120 is arranged inside the sleeve 1200, and the motorshaft 1130 passes through a through hole of the connecting seat 1300.After energization, the rotor 1120 is rotated under the action of theexcitation magnetic field generated by the stator 1110, and drives themotor shaft 1130 to rotate. The transmission device 2000 includes a gearbox 2100, a planetary assembly 2200 and a valve stem 2300. A stepprovided at one end of the gear box 2100 is fixedly connected to theconnecting seat 1300 and is formed with a step hole. The connecting seat1300 is threadly connected to or sealingly welded to the step. Inaddition, a sealing member may be provided at a connection for improvingthe sealing performance when the connecting seat 1300 is threadlyconnected to the step. The other end of the gear box 2100 is fixedlyconnected to the valve body 3000, and the gear box 2100 may be sealinglywelded to the valve body 3000, or the gear box 2100 may be threadlyconnected to the valve body 3000 with a sealing member being provided atthe connection. The planetary assembly 2200 is arranged in a chamberformed by the gear box 2100, or the planetary assembly 2200 is arrangedin a chamber formed by the gear box 2100, the connecting seat 1300and/or the valve body 3000. The planetary assembly 2200 includes a sungear 2210, multiple planet gears 2220, a gear shaft, a first gear ring2230, a second gear ring 2240 and two mounting plates 2250. In thisembodiment, the planetary assembly 2200 includes three planet gears2220, which are in meshing connection with the sun gear 2210, both thefirst gear ring 2230 and a second gear ring 2240 have internal teeth. Apart of each of the planet gears 2220 is meshed and connected with theinternal teeth of the first gear ring 2230, and the other part of eachof the planet gears 2220 is meshed and connected with the internal teethof the second gear ring 2240. An outer side portion of the first gearring 2230 is fixedly connected to the gear box 2100, for example, thefirst gear ring 2230 is relatively fixed to the gear box 2100 byinterference fit or limiting fit. The planet gears 2220 and the sun gear2210 are arranged between the two mounting plates 2250, and a throughhole through which the motor shaft 1130 passes is defined on themounting plate 2250 close to the driving mechanism 1000, so as tofacilitate the cooperation of the motor shaft 1130 and the sun gear2210.

Referring to FIGS. 3 to 5, the second gear ring 2240 has a limitingportion 2241, and the limiting portion 2241 is arranged on a side of thesecond gear ring 2240 facing the valve body 3000. In this embodiment,the limiting portion 2241 is formed as two arc-shaped grooves, and thetwo arc-shaped grooves are arranged symmetrically relative to an axis ofthe second gear ring 2240. Accordingly, referring to FIG. 13, the valvebody 3000 is provided with limiting posts 3010 for cooperating with thelimiting portion 2241. Similarly, the limiting posts 3010 are arrangedsymmetrically relative to the axis of the second gear ring 2240. Thelimiting posts 3010 are arranged in the arc-shaped grooves, and therotation range of the second gear ring 2240 can be set by two ends ofthe limiting portion 2241. It can be known that the rotation range ofthe second gear ring 2240 is limited by setting an arc angle between thetwo ends of the limiting portion 2241, so as to limit a rotation rangeof the valve stem 2300. In this embodiment, the arc angle of thelimiting portion 2241 is set to 90 degrees, and the arc angle of thelimiting portion 2241 may be set adaptively according to differentdisclosure environments. One end of the valve stem 2300 extends into acenter hole of the second gear ring 2240, and the valve stem 2300 isfixedly connected to the second gear ring 2240 by interference fit orwelding. Alternatively, the valve stem 2300 may be connected to thesecond gear ring 2240 by injection molding.

In the case that the fluid management assembly 10 is in operation, whenthe motor shaft 1130 rotates, the sun gear 2210 rotates driven by themotor shaft 1130. Due to the meshing effect, the planet gears 2220rotate driven by the sun gear 2210, the first gear ring 2230 is fixedand, the planet gears 2220 not only rotate around its own axis, but alsorotate circumferentially around the sun gear 2210, so as to drive thesecond gear ring 2240 to rotate while the valve stem 2300 also rotateswith the rotation of the second gear ring 2240. Since the limitingportion 2241 and the limiting posts 3010 are in mutual cooperating, thevalve stem 2300 rotates within a certain range. The valve body 3000includes a valve stem hole, inwhich part of the valve stem 2300 isarranged, and the valve stem 2300 is dynamically sealed with the valvestem hole. In addition, the fluid management assembly may furtherinclude a bush, the bush is embedded in the valve stem hole and fixed tothe valve stem hole, the valve stem 2300 is sleeved in the bush, and thevalve stem 2300 is dynamically sealed with the bush. Referring to FIG.3, the fluid management assembly 10 includes a first chamber 100 and asecond chamber 200, the first chamber 100 can be in communication withthe second chamber 200, the first valve core 5000 of the fluidmanagement assembly 10 is arranged in the first chamber 100, and thefirst valve core 5000 is rotatable in the first chamber 100.

Referring to FIGS. 3 and 39, the fluid management assembly 10 includes afirst flow passage 300, a second flow passage 400 and a third flowpassage 500. The first flow passage 300 is provided with a firstconnecting port 1 in an outer wall of the valve body 3000, the secondflow passage 400 is provided with a second connecting port 2 in theouter wall of the valve body 3000, and the third flow passage 500 isprovided with a third connecting port 3 in the outer wall of the valvebody 3000. The first flow passage 300 is in communication with the firstchamber 100, the third flow passage 500 can be in communication with thesecond chamber 200, and the second flow passage 400 is in communicationwith the second chamber 200. In one or more embodiments of the technicalsolution of the present disclosure, the first flow passage 300 is aninlet passage of the first chamber 100, the second flow passage 400 isan outlet passage of the second chamber 200, and the third flow passage500 is another outlet passage of the second chamber 200. The fluidmanagement assembly 10 further includes a conduction pipe 700, and thesecond flow passage 400 includes a chamber formed by the conduction pipe700. In this embodiment, the conduction pipe 700 is integrally arrangedwith the valve body 3000, a first port 701 of the conduction pipe 700faces a bottom wall of the second chamber 200 and is in communicationwith the second chamber 200. In the technical solution of thisembodiment, an axis direction of the conduction pipe 700 is oriented inan upward and downward direction, where the first port 701 of theconduction pipe 700 faces downward. Accordingly, a wall of the secondchamber 200 that the first port 701 of the conduction pipe 700 faces isthe bottom wall of the second chamber 200.

Referring to FIGS. 1, 3 and 43, the fluid management assembly 10 furtherincludes a valve bonnet 4000, the valve body 3000 includes a firstopening portion 3110, and the first opening portion 3110 is recessedfrom a side wall of the valve body 3000 toward an interior of the valvebody 3000. The first opening portion 3110 has an opening in the sidewall of the valve body 3000, at least part of the valve bonnet 4000 isarranged in a chamber formed by the first opening portion 3110, and thevalve bonnet 4000 is fixedly arranged with the first opening portion3110. Specifically, the fluid management assembly 10 includes aconnecting device, the connecting device includes a connecting portion4410 and a matching portion 3111, the connecting portion 4410 is formedin the valve bonnet 4000, and the matching portion 3111 is formed in awall of the first opening portion 3110. In a specific embodiment, thematching portion 3111 is formed with an internal thread on the firstopening portion 3110, the connecting portion 4410 is provided with anexternal thread in an outer wall of the valve bonnet 4000, and theinternal thread of the first opening portion 3110 cooperates with theexternal thread of the valve bonnet 4000 so as to fix the valve bonnet4000 and the first opening portion 3110. In other embodiments, the fluidmanagement assembly 10 further includes a snap ring, the connectingportion is provided with a groove in the outer wall of the valve bonnet,and the matching portion is provided with a groove in the wall of thefirst opening portion. After the snap ring arranged in the groove of theconnecting portion reaches a predetermined position, the snap ringopens, and part of the snap ring is arranged in the groove of the firstopening portion, so as to fix the valve bonnet 4000 and the valve body3000.

The fluid management assembly 10 further includes a first accommodatingchamber, a second accommodating chamber and a sealing member. Thesealing member is arranged in the first accommodating chamber and thesecond accommodating chamber. The first accommodating chamber is closerto the first valve core than the second accommodating chamber, and thefirst accommodating chamber and the second accommodating chambersurround a circumferential side of the valve bonnet. In a specificembodiment, the first accommodating chamber is formed as a first groove4130, the second accommodating chamber is formed as a second groove4210, or the first accommodating chamber includes a chamber formed bythe first groove 4130, the second accommodating chamber includes achamber formed by the second groove 4210, and the first groove 4130 andthe second groove 4210 are circumferentially distributed along an outerside wall of the valve bonnet 4000. The second groove 4210 is arrangedbetween an outer end wall 4010 of the valve bonnet 4000 and the externalthread of the valve bonnet 4000, the first groove 4130 is arrangedbetween an inner end wall 4020 of the valve bonnet 4000 and the externalthread of the valve bonnet 4000, and the sealing member is arranged inthe first groove 4130 and the second groove 4210 of the valve bonnet4000. The two grooves of the valve bonnet 4000, the sealing member andthe first opening portion 3110 cooperate with each other, so as torealize the sealing between the valve bonnet 4000 and the first openingportion 3110. In other embodiments, the grooves for placing the sealingmember may be arranged in the first opening portion 3110, so as torealize the sealing between the valve bonnet 4000 and the first openingportion 3110. In addition, the valve bonnet 4000 may be sealingly fixedto the first opening portion 3110 by welding, which will not bedescribed in detail.

Referring to FIGS. 3 and 43, the valve bonnet 4000 includes a firstcommunication passage 4300, the first communication passage 4300 isprovided with a first opening 4301 of the first communication passage4300 in the inner end wall 4020 of the valve bonnet 4000, and the firstcommunication passage 4300 is provided with a second opening 4302 of thefirst communication passage 4300 in a side wall of the valve bonnet4000. Specifically, the valve bonnet 4000 includes a first hole 4110 anda second hole 4120, and a chamber formed by the first hole 4110 is incommunication with a chamber formed by the second hole 4120. In thisembodiment, the first communication passage 4300 includes the chamberformed by the first hole 4110 and the chamber formed by the second hole4120, and an axis of the first hole 4110 is parallel to an axis of thefirst opening portion 3110, and the term “parallel” here means that anincluded angle between the axis of the first hole 4110 and the axis ofthe first opening portion 3110 is within ±10 degrees. An axis of thesecond hole 4120 is perpendicular to the axis of the first openingportion 3110, and the term “perpendicular” here means that an includedangle between the axis of the second hole 4120 and the axis of the firstopening portion 3110 ranges from 80 degrees to 90 degrees.Alternatively, an included angle between the axis of the second hole4120 and the axis of the first hole 4110 may range from 45 degrees to135 degrees. An opening of the first hole 4110, that is, the firstopening 4301 of the first communication passage 4300, is formed in theinner end wall of the valve bonnet 4000. An opening of the second hole4120, that is, the second opening 4302 of the first communicationpassage 4300, is formed in the side wall of the valve bonnet 4000. In anaxial direction of the first opening portion 3110, the opening of thesecond hole 4120 is arranged between the first groove 4130 and thesecond groove 4210, which can avoid fluid leakage. It can be known thata wall forming the first chamber 100 includes a partial wall of thefirst opening portion 3110 and the inner end wall of the valve bonnet4000. In other embodiments, the wall forming the first chamber 100 maynot include the inner end wall of the valve bonnet 4000. In thisembodiment, the valve bonnet 4000 includes a first sub valve bonnet 4100and a second sub valve bonnet 4200. The first sub valve bonnet 4100 isseparately arranged with the second sub valve bonnet 4200, and the firstsub valve bonnet 4100 is closer to the first valve core 5000 than thesecond sub valve bonnet 4200. The first sub valve bonnet 4100 includesthe first hole 4110 and the second hole 4120, the opening of the firsthole 4110 is the first opening 4301 of the first communication passage4300, and the first opening 4301 is arranged on an inner end wall of thefirst sub valve bonnet 4100. The opening of the second hole 4120 is thesecond opening 4302 of the first communication passage 4300, and thesecond opening 4302 is arranged on a side wall of the first sub valvebonnet 4100. The second sub valve bonnet 4200 has an external thread,which cooperates and is fixed to the internal thread of the firstopening portion 3110, and an outer end wall of the first sub valvebonnet 4100 abuts against an inner end wall of the second sub valvebonnet 4200. The first groove 4130 is arranged in the side wall of thefirst sub valve bonnet 4100, and the second groove 4210 is arranged in aside wall of the second sub valve bonnet 4200.

Referring to FIGS. 43 to 46, the fluid management assembly 10 includes alimiting device. The limiting device includes a limiting recess 4140 anda limiting pin 3112, the limiting recess 4140 has an opening in the sidewall of the first sub valve bonnet 4100, at least part of the limitingpin is arranged in the limiting recess 4140, and the limiting pin 3112is integrated or separately arranged with the valve body 3000. In aspecific embodiment, the limiting recess 4140 has openings in the sidewall of the first sub valve bonnet 4100 and the inner end wall of thefirst sub valve bonnet 4100, and the opening of the limiting recess 4140in the side wall of the first sub valve bonnet 4100 is in communicationwith the opening of the limiting recess 4140 in the inner end wall ofthe first sub valve bonnet 4100. The limiting pin 3112 is integratedwith the valve body 3000, and the limiting pin 3112 protrudes from aside wall of the first opening portion 3110 toward the first sub valvebonnet 4100. When mounting the valve bonnet 4000, the limiting recess4140 cooperates with the limiting pin 3112, the first sub valve bonnet4100 is placed in a predetermined position, and then the second subvalve bonnet 4200 is tightened, which can prevent the first sub valvebonnet 4100 from deviating from the predetermined position, andfacilitate the positioning of the second opening 4302 of the firstcommunication passage 4300. Alternatively, the second sub valve bonnet4200 may be integrated with the first sub valve bonnet 4100, whichrelatively reduces the mounting steps. In other embodiments, thelimiting recess 4140 includes a first limiting recess 4141 and a secondlimiting recess 4142, the first limiting recess 4141 is provided with anopening at least in the outer end wall of the first sub valve bonnet4100, and the opening of the first limiting recess 4141 in the outer endwall of the first sub valve bonnet 4100 is integrated with an opening ofthe first limiting recess 4141 in the side wall of the first sub valvebonnet 4100. The first opening portion 3110 includes a step wall 3313,the second limiting recess 4142 has openings in the step wall 3313 andthe side wall of the first opening portion 3110, and the opening of thesecond limiting recess 4142 in the step wall 3313 is integrated with theopening of the second limiting recess 4142 in the first opening portion3110. The limiting pin 3112 is separately arranged with the valve body3000, and the limiting pin 3112 is arranged in the first limiting recess4141 and the second limiting recess 4142.

Referring to FIG. 3 and FIGS. 6 to 8, the fluid management assembly 10includes a valve seat. Specifically, the valve seat includes a firstvalve seat 6100 and a second valve seat 6200. The first valve core 5000has a spherical or quasi-spherical structure, and the first valve core5000 may have a cylindrical structure. The first valve core 5000includes a matching groove 5300 matching with the valve stem 2300, thevalve stem 2300 can extend into the matching groove 5300, and the valvestem 2300 can drive the first valve core 5000 to rotate. The first valvecore 5000 is arranged between the first valve seat 6100 and the secondvalve seat 6200 in the axial direction of the first opening portion3110, and both the first valve seat 6100 and the second valve seat 6200have matching surfaces matching with the first valve core 5000. In acase that the first valve core 5000 is spherical or quasi-spherical, thematching surfaces are correspondingly arc-shaped surfaces, the matchingsurfaces of the valve seat may be protruded toward the first valve core5000, or may be recessed from the first valve core 5000. An outer wallof the first valve core 5000 abuts against at least part of the matchingsurface 6120 of the first valve seat, and the outer wall of the firstvalve core 5000 abuts against at least part of the matching surface ofthe second valve seat 6200, the first valve core 5000 is slidablerelative to the matching surface 6120 of the first valve seat, and thefirst valve core 5000 is dynamically sealed with the matching surface6120 of the first valve seat. The first valve core 5000 is slidablerelative to the matching surface of the second valve seat 6200, and thefirst valve core 5000 is dynamically sealed with the matching surface ofthe second valve seat 6200. It can be known that, the wall forming thefirst chamber 100 includes the inner end wall of the valve bonnet 4000,a bottom wall of the first opening portion 3110 and part of the sidewall of the first opening portion 3110, or the wall forming the firstchamber 100 includes the inner end wall of the valve bonnet 4000, thebottom wall of the first opening portion 3110, part of the side wall ofthe first opening portion 3110, the matching surface 6120 of the firstvalve seat and the matching surface of the second valve seat 6200.Referring to FIGS. 3 and 6, the first valve seat 6100 has a passage 6110extending through the first valve seat, the passage 6110 of the firstvalve seat is provided with a first opening of the passage of the firstvalve seat on the matching surface 6120 of the first valve seat. It canbe known that the matching surface 6120 of the first valve seat is anannular arc-shaped surface, the passage 6110 of the first valve seat hasopenings in both the matching surface and a side facing the firstcommunication passage 4300, so that the passage 6110 of the first valveseat is in communication with the first communication passage 4300.Similarly, the second valve seat 6200 has a passage extending throughthe second valve seat 6200, the passage of the second valve seat 6200has openings in the matching surface of the second valve seat 6200 andanother side of the second valve seat 6200, and the passage of thesecond valve seat 6200 is provided with a first opening of the passageof the second valve seat 6200 in the matching surface of the secondvalve seat 6200. It can be known that the matching surface of the secondvalve seat 6200 is an annular arc-shaped surface, and the passage of thesecond valve seat 6200 can be in communication with the second chamber200.

The first valve seat 6100 may be integrated with the valve bonnet 4000,and the second valve seat 6200 is integrated with the first openingportion. The “integrated with” herein includes “being fixed as a whole”and “being integrally formed”. Specifically, the first valve seat 6100is sealingly fixed as a whole or is assembled and extruded as a wholewith the inner end wall of the valve bonnet 4000. More specifically, theinner end wall of the valve bonnet 4000 is formed as a step for placingthe first valve seat 6100, or in other words, at least part of the firstvalve seat 6100 is arranged at the step of the valve bonnet 4000.Accordingly, the opening of the first hole 4110 is formed at the step ofthe valve bonnet 4000. The fluid management assembly 10 may further beprovided with a sealing member between the first valve seat 6100 and thestep of inner end wall of the valve bonnet 4000, so as to enhance thesealing performance between the first valve seat 6100 and the valvebonnet 4000. Similarly, the second valve seat 6200 is integrally formedwith the first opening portion 3110, including of being fixed as a wholeand being integrally formed with the first opening portion 3110. Thesecond valve seat 6200 is fixedly arranged with the first openingportion 3110. Specifically, the second valve seat 6200 is sealinglyfixed to the bottom wall of the first opening portion 3110.Specifically, a recess for accommodating the second valve seat 6200 isformed at the bottom wall of the first opening portion 3110, and asealing member is arranged between the second valve seat 6200 and thefirst opening portion 3110, so as to enhance sealing performance, reduceleakage, and improve control accuracy. It should be noted here that thevalve seat and the sealing member may be made into an integralstructure. In other embodiments, the first valve seat 6100 may beintegrally formed with the valve bonnet 4000, or in other words, thevalve bonnet 4000 is provided with the first valve seat 6100. Similarly,the second valve seat 6200 may be processed and formed integrally withthe valve body, and the second valve seat 6200 is formed on the bottomwall of the first opening portion 3110. The fluid management assembly 10is provided with the first valve seat 6100 and the second valve seat6200, so that the first valve core 5000 can be supported by the firstvalve seat 6100 and the second valve seat 6200, and contact parts of thefirst valve seat 6100 and the second valve seat 6200 with the firstvalve core 5000 can be slidably sealed.

The fluid management assembly 10 includes a throttle chamber. Referringto FIGS. 7 to 11, the first valve core 5000 includes a throttle passage5100 and a conduction passage 5200, and the throttle passage 5100 is notin communication with the conduction passage 5200. In this embodiment,the throttle passage 5100 is formed as a throttle groove, the throttlepassage 5100 is recessed from the outer wall of the first valve core5000, and the throttle passage 5100 has an opening in the outer wall ofthe first valve core 5000. Taking the first valve seat as an example,when the fluid management assembly is throttled, part of the opening ofthe throttle passage 5100 faces the matching surface 6120 of the firstvalve seat, and a wall forming the throttle chamber includes thematching surface of the first valve seat 6100 and a wall ofcorresponding throttle groove. The throttle passage 5100 includes a headend and a tail end, referring to FIG. 9 and FIG. 10, a first surface isdefined, which is perpendicular to the axis of the first opening portion3110. It can be known that a projection 6120′ of the matching surface6120 of the first valve seat on the first surface is an annular surface.When the fluid management assembly is throttled, a projection 5110′ ofthe head end on the first surface and a projection 5120′ of the tail endon the first surface are arranged on two sides of the projection 6120′of the matching surface on the first surface in a radial direction ofthe projection 6120′ of the matching surface 6120 of the first valveseat. The terms “head end” and “tail end” described here refer to twoends of a bottom wall of the throttle groove or portions extending fromthe two ends of the bottom wall into the throttle groove, so that thehead end and the tail end of the throttle groove are formed as an outletand an inlet of the throttle chamber. In this embodiment, a crosssectional shape of the throttle passage 5100 is rectangular, as shown inFIG. 7. The cross-sectional shape of the throttle passage 5100 may be inV-shape or other shapes. An extension direction of the throttle passage5100 is substantially the same as a rotating direction of the firstvalve core 5000, or may form other angle with the rotating direction ofthe first valve core 5000. The throttle passage 5100 includes a firstsection, a second section and a third section, inwhich the secondsection includes the tail end, and the third section includes the headend. When the fluid management assembly is throttled, an opening of thefirst section faces the matching surface 6120 of the first valve seat,an opening of the second section faces the passage 6110 of the firstvalve seat, and an opening of the third section faces the first chamber100, so that the fluid in the first chamber 100 enters the passage ofthe first valve seat after passing through the throttle chamber. Forbetter understanding, referring to FIG. 10, a projection 5130′ of thefirst section on the first surface is arranged within the projection6120′ of the matching surface of the first valve seat, a projection5140′ of the second section on the first surface is arranged within aprojection 6110′ of the passage of the first valve seat, and aprojection 5150′ of the third section on the first surface is arrangedwithin a projection of the first chamber, so that the opening of thethrottle chamber is relatively increased, which is beneficial for thefluid to enter the throttle chamber. Herein, the projection 5110′ of thehead end is arranged within the projection of the first chamber 100, andthe projection 5120 of the tail end is arranged within the projection6110′ of the passage of the first valve seat. In another embodiment,referring to FIG.11, the projection 5150′ of the third section on thefirst surface includes two parts, which are both arranged outside theprojection 6120′ of the matching surface, that is, the opening of thethird section faces the first chamber. The projection 5130′ of the firstsection further includes two parts, which are both arranged in theprojection 6120′ of the matching surface. The projection 5140′ of thesecond portion is arranged in the projection 6110′ of the passage of thefirst valve seat, so that the fluid in the first chamber 100 can enterthe passage of the first valve seat through two throttle paths, whichcan increase the throttle passage and improve the efficiency. The wallforming the throttle chamber may be a throttle orifice. Specifically,the throttle passage may also be the throttle orifice, and the throttlepassage 5100 has two openings in the outer wall of the first valve core5000, which the two openings of the throttling orifice are the head endand the tail end of the throttle passage. When the fluid managementassembly is throttling, the two openings of the throttle passage 5100are arranged at two sides of the annular surface, one of the twoopenings of the throttle passage 5100 is in communication with the firstchamber 100, the other one of the two openings of the throttle passage5100 is in communication with the passage of the first valve seat 6100or the passage of the second valve seat 6200, which will not bedescribed in detail.

Referring to FIGS. 47 to 50, the throttle passage 5100 is formed as athrottle groove, the walls of the throttle passage include a firstbottom wall 5110 and a second bottom wall 5120, the first bottom wall5110 is arranged intersected with the second bottom wall 5120, the“arranged intersected” here refers to that the first bottom wall 5110and the second bottom wall 5120 have a common intersecting line or acommon intersecting area, which the common intersecting area may be arounding or chamfering between the first bottom wall 5110 and the secondbottom wall 5120. The first bottom wall 5110 extends from the outer wallof the first valve core to the second bottom wall 5120, and the secondbottom wall 5120 extends from the first bottom wall 5110 to the outerwall of the first valve core 5000 in an action or rotating direction ofthe first valve core 5000. It can be known that a wall of the head endof the throttle passage 5100 may be a part of the first bottom wall5110, a wall of the tail end of the throttle passage 5100 may be a partof the second bottom wall 5120. Alternatively, the wall of the head endof the throttle passage 5100 may be a part of the second bottom wall5120, and the wall of the tail end of the throttle passage 5100 may be apart of the first bottom wall 5110. In this embodiment, the first bottomwall 5110 is an arc-shaped surface, and a convexity of the first bottomwall 5110 is the same with the opening of the throttle passage 5000. Thefirst bottom wall 5110 may be in other shape, such as a flat surface, orthe combination of a flat surface and an arc-shaped surface, which willnot be described in detail. Referring to FIG. 49, the second bottom wall5120 includes a straight section 5121 and a first arc-shaped section5122, the first arc-shaped section 5122 extends from the outer wall ofthe first valve core 5000 to the straight section 5120, and the straightsection 5121 is closer to a center of the first valve core 5000 than thefirst arc-shaped section 5122 in the radial direction of the first valvecore 5000. In other embodiments, the second bottom wall 5120 may onlyinclude the first arc-shaped section 5122, and the first arc-shapedsection 5122 extends from the outer wall of the first valve core 5000toward the first bottom wall 5110. The first arc-shaped section 5122 isprovided in the second bottom wall, which reduces the sharpness of aconnection between the second bottom wall 5120 and the outer wall of thefirst valve core 5000, and can relatively reduce the wear of thematching surface of the valve seat by the first valve core 5000.Similarly, a second arc-shaped section is provided in the first bottomwall 5110, and the second arc-shaped section extends from the outer wallof the first valve core toward the second bottom wall 5120, which willnot be described in detail.

In this embodiment, along the rotating direction of the first valve core5000, a length of the opening of the throttle passage 5100 is longerthan a length of the first bottom wall 5110, and the length of theopening of the throttle passage 5100 is longer than a length of thesecond bottom wall 5120. The opening of the throttle passage 5100 islonger than both the first bottom wall 5110 and the second bottom wall5120, which facilitates for a processing tool to act in the throttlepassage, such as facilitating the processing tool of entering or exitingthe throttle passage, facilitating the processing tool of moving in thethrottle passage, and reduces the difficulty of processing the firstvalve core 5000. Referring to FIG. 50, the wall of the throttle passage5100 further includes a first side wall 5130 and a second side wall, thefirst side wall 5130 is arranged opposite to the second side wall, thefirst bottom wall 5110 is arranged between the first side wall 5130 andthe second side wall, the second bottom wall 5120 is arranged betweenthe first side wall 5130 and the second side wall, the included anglebetween a surface where the first bottom wall 5110 is arranged and asurface where the first side wall 5130 is arranged may be 90 degrees, orgreater or less than 90 degrees. Similarly, an included angle betweenthe surface where the first bottom wall 5110 is arranged and a surfacewhere the second side wall is arranged may be 90 degrees, or greater orless than 90 degrees. The first side wall 5130 includes a first sideline 5131 and a second side line 5132, the first side line is arrangedon the outer wall of the first valve core 5000, or in other words, thefirst side line 5131 is an intersecting line or an intersecting areabetween the outer wall of the first valve core 5000 and the first sidewall 5130. The second side line 5132 is arranged in the first bottomwall 5110, or in other words, the second side line 5132 is anintersecting line or an intersecting area between the first bottom wall5110 and the first side wall 5130. In this embodiment, an arc center ofthe first side line 5131 is arranged offset to an arc center of thesecond side line 5132, which facilitates the processing and formation ofthe throttle passage 5100. A radial distance between the first side line5131 and the second side line 5132 decreases in the moving direction ofthe first valve core 5000, or in other words, a depth of the throttlegroove decreases in the moving direction of the first valve core 5000;or in other words, a radial distance between the opening of the throttlepassage 5100 and the first bottom wall 5110 decreases in the movingdirection of the first valve core 5000. In this way, a cross-sectionalarea of the throttle passage 5100 decreases, that is, a fluid flowratedecreases in the moving direction of the first valve core 5000. Thecross-sectional area of the throttle passage 5100 can be adjusted byadjusting a rotation angle of the first valve core 5000, so as to adjustthe fluid flow rate. Furthermore, the first side line 5131 is parallelto the moving direction of the first valve core 5132 in the actiondirection of the first valve core 5000, so that the fluid managementassembly 10 adjusts the cross-sectional area of the throttle passage5100 by rotating the first valve core 5000, which is relatively fast andhas a relatively high efficiency.

In this embodiment, referring to FIG. 48, an included angle between thefirst bottom wall 5110 and the second bottom wall 5120 is a firstincluded angle E, where the first included angle E is greater than orequal to 80 degrees and less than or equal to 160 degrees. The includedangle referred to here may be an included angle between the surfacewhere the first bottom wall 5110 is arranged and a surface where thesecond bottom wall 5120 is arranged, or an included angle between atangent plane of the first bottom wall 5110 and a tangent plane of thesecond bottom wall 5120, or an included angle between the tangent planeof the first bottom wall 5110 and the surface where the second bottomwall 5120 is arranged, or an included angle between the tangent plane ofthe second bottom wall 5120 and the surface where the first bottom wall5110 is arranged. During the rotation of the first valve core 5000, adistance between the second bottom wall 5120 and the matching surface ofthe valve seat gradually decreases as the distance between the tail endof the throttle passage 5100 and the matching surface of the valve seatgradually decreases. During the throttling process of the fluidmanagement assembly, in a case that the distance between the tail end ofthe throttle passage 5100 and the matching surface of the first valveseat 6100 is greater than a distance between the matching surface of thefirst valve seat 6100 and the first bottom wall 5110, the flowadjustment of the first valve core 5000 can be performed normally. In acase that the distance between the tail end and the matching surface6120 of the first valve seat is less than the distance between thematching surface 6120 of the first valve seat and the first bottom wall5110, a chamber formed by the tail end of the throttle passage 5100 andthe matching surface 6120 of the first valve seat is a fluid passage,and the throttling effect is relatively poor or does not meet therequirement. Therefore, the included angle between the first bottom wall5110 and the second bottom wall 5120 is limited, so that the distancebetween the first bottom wall 5110 and the matching surface of the valveseat is relatively extended or the interference of the tail end isdelayed, that is, the adjustment range of the throttle passage 5100 isextended, which is beneficial to improving the flow adjustmentperformance of the fluid management assembly.

Referring to FIGS. 7 to 9 and FIG. 39, the fluid management assembly 10has a conducting function, and the conduction is achieved through theconduction passage 5200. The conduction passage 5200 is formed in thefirst valve core 5000 and has two openings, said two openings of theconduction passage 5200 are formed in the outer wall of the first valvecore 5000. When the fluid management assembly is conducted, twoprojections of the conduction passage 5200 are arranged at two sides ofthe matching surface in a radial direction of the projection of thematching surface of the valve seat. Specifically, the first valve core5000 includes a third hole 5210 and a fourth hole 5220, a chamber formedby the third hole 5210 is in communication with a chamber formed by thefourth hole 5220, and the conduction passage 5200 of the first valvecore 5000 includes the chamber formed by the third hole 5210 and thechamber formed by the fourth hole 5220. In this embodiment, an axis ofthe fourth hole 5220 is parallel to an axis of the valve stem 2300. Anopening of the fourth hole 5220 in the outer wall of the first valvecore 5000 faces away from the valve stem 2300, and an axis of the thirdhole 5210 is perpendicular to the axis of the valve stem 2300. In thisembodiment, the first flow passage 300 has an opening in the wall of thefirst opening portion 3110, or in other words, the first flow passage300 has an opening in the wall of the first chamber 100, the first flowpassage 300 is in communication with the first chamber 100, and an axisof the first flow passage 300 is perpendicular to the axis of the firstopening portion 3110. Correspondingly, the axis of the third hole 5210is perpendicular to the axis of the fourth hole 5220. When the fluidmanagement assembly 10 is in operation, the fluid in the first flowpassage 300 enters the first chamber 100, and then enters the fourthhole 5220, and nextly enters the third hole 5210. In a case that anopening of the first hole 4110 is in communication with the passage 6120of the first valve seat, the conducting function of the fluid managementassembly 10 is realized. The axis of the fourth hole 5220 may beperpendicular to the axis of the valve stem 2300, so that the opening ofthe fourth hole 5220 can be arranged opposite to the opening of thefirst flow passage 300, and an opening of the third hole 5210 can bearranged opposite to the passage 6120 of the first valve seat, which canreduce the flow resistance of the fluid in the first flow passage 300into the conduction passage 5200. It can be known that an included anglebetween the axis of the third hole 5210 and the axis of the fourth hole5220 can range from 45 degrees to 135 degrees. In a case that the fluidmanagement assembly 10 is conducted, one opening of the conductionpassage 5200 is arranged opposite to the passage of the valve seat, theother opening of the conduction passage 5200 faces the first chamber, sothat the communication between the first chamber 100 and the passage ofthe valve seat can be realized.

Referring to FIG. 3 and FIG. 39, the valve body 3000 further includes afirst passage 3120, and the first chamber 100 can be in communicationwith the second chamber 200 through the first passage 3120.Specifically, the first passage 3120 has two openings, the first passage3120 is provided with a first opening 3121 of the first passage 3120 inthe wall of the second chamber 200, so that the first passage 3120 is incommunication with the second chamber 200. The first passage 3120 isprovided with a second opening 3122 of the first passage 3120 in thebottom wall of the first opening portion 3110, so that the secondopening 3122 of the first passage 3120 is in communication with thepassage of the second valve seat 6200. In this embodiment, an axis ofthe first passage 3120 is parallel to the axis of the first openingportion 3110. The “parallel” here includes a case that the axes areoverlapping, and further includes the case that an included anglebetween the axis of the first passage 3120 and the axis of the firstopening portion 3110 is within ±10° degrees. In other embodiments, thefirst passage 3120 may only be of the first opening of the firstpassage.

In order to improve the gas-liquid separation effect of the secondchamber 200, the fluid management assembly 10 further includes theconduction pipe 700. The conduction pipe 700 may be processed and formedby the same profile with the valve body 3000, or the conduction pipe 700may be separately arranged with the valve body 3000, and then assembledtogether. A first port 701 of the conduction pipe 700 is arranged in thesecond chamber 200, and the first port 701 of the conduction pipe 700faces the bottom wall of the second chamber 200. In this embodiment,referring to FIG. 18, a side wall of the second chamber 200 includes afirst sub-portion 230 and a second sub-portion 240, the secondsub-portion 240 is arranged between a top wall of the second chamber 200and the first port 701 of the conduction pipe 700, and the first opening3121 of the first passage is arranged in the second sub-portion 240,which can prevent the fluid discharged from the first opening 3121 ofthe first passage from directly entering the second flow passage 400.Instead, after the gas-liquid separation process, the gas enters thesecond flow passage 400 through a chamber of the conduction pipe, andthe liquid is deposited and collected on the bottom wall of the secondchamber 200. In this embodiment, the first opening 3121 of the firstpassage is arranged in the side wall of the second chamber 200, and thefarther the first opening 3121 of the first passage is from the firstport 701 of the conduction pipe 700, the less likely the liquid is to besucked away by the conduction pipe 700. Besides, the first passage 3120may be provided with the first opening of the first passage 3120 in thetop wall of the second chamber 200, or the first passage 3120 may beprovided with the first opening of the first passage 3120 in the topwall and the second sub-portion of the second chamber 200.

Referring to FIG. 16, a first cross section is defined, which isperpendicular to an axis of the conduction pipe 700, the axis of thefirst passage 3120 is arranged in the first cross section, and anintersecting line between a wall forming the first passage 3120 and thefirst cross section includes a first side line 3123 and a second sideline 3124. An intersecting line between the side wall of the secondchamber 200 and the first cross section is defined as a first loop line200′, an intersecting line between an outer wall of the conduction pipe700 and the first cross section is defined as a second loop line 700′,and the second side line 3124 is closer to the second loop line 700′than the first side line 3123. The extension lines of the first sideline 3123 and the second side line 3124 are arranged on the same side ofthe second loop line 700′ in a radial direction of the first loop line200′, or in other words, the second loop line 700′ is not arrangedbetween the extension line of the first side line 3123 and the extensionline of the second side line 3124 in the radial direction of the firstloop line 200′, which also includes a case that the extension line ofthe second side line 3124 is tangent to the first loop line and a casethat the extension line of the first side line 3123 is tangent to thefirst loop line 200′. In this embodiment, the first loop line 200′ andthe second loop line 700′ are both circular, and the first side line3123 is parallel to the second side line 3124. It should be noted thatthe first loop line and the second loop line may be in arc-shape,rectangle or other shapes, and the first side line 3123 may not beparallel to the second side line 3124; the axis direction of the firstloop line 200′ refers to a direction from a center or near-center areaof the first loop line to the first loop line. In this way, the fluiddischarged from the first passage 3120 substantial spirally flows in thesecond chamber 200, which extends the gas-fluid separation path, andfacilitates the gas-liquid separation. In addition, the first passage3120 is not directly facing the conduction pipe 700, and the fluiddischarged from the first passage 3120 cannot directly impact theconduction pipe 700, which also facilitates the discharge of gas andliquid in the conduction pipe 700, and it is less likely for the liquidfluid to adhere to the outer wall of the conduction pipe 700. Referringto FIGS. 3, 13, and 12, the bottom wall of the second chamber 200includes a first bottom wall 221 and a second bottom wall 222, adistance between the second bottom wall 222 and the first port 701 ofthe conduction pipe 700 is greater than a distance between the firstbottom wall 221 and the first port 701 of the conduction pipe 700 in anaxial direction of the conduction pipe 700, so that the liquid fluid iscollected on the second bottom wall 222 after the fluid is gas-liquidseparated, which facilitates the liquid fluid of being collected on thesecond bottom wall 222, and a discharge port is provided in the secondbottom wall 222, which facilitates the discharge of the liquid fluid;the first bottom wall 221 is higher than the second bottom wall 222, andthere is no or only a small amount of the liquid fluid on the firstbottom wall 221, the first port 701 of the conduction pipe 700 faces thefirst bottom wall 221, and the projection of the first port 701 of theconduction pipe 700 is all arranged within the first bottom wall 221 inthe axial direction of the conduction pipe 700, which is beneficial topreventing the liquid fluid arranged on the bottom wall of the secondchamber 200 from being sucked away by the conduction pipe 700. Inaddition, the first bottom wall 221 and the second bottom wall 222 maybe processed and formed integrally or separately. In this embodiment,the second bottom wall 222 is an annular wall. The third flow passage500 has an opening in the outer wall of the valve body. The third flowpassage 500 is provided with a first opening 501 of the third flowpassage 500 in the wall of the second chamber 200, the first opening 501is arranged in the second bottom wall 222, that is, a discharge port isprovided in the second bottom wall 222, and the third flow passage 500is in communication with the second chamber 200; the third flow passage500 has a second opening 3, that is, the third connecting port 3, of thethird flow passage 500 in the outer wall of the valve body 3000. Thefirst sub-portion 230 is arranged between the first bottom wall 221 andthe second bottom wall 222 in the axial direction of the conduction pipe700.

Referring to FIG. 18, the valve body 3000 includes a second openingportion 3210, the third flow passage 500 includes a chamber of thesecond opening portion 3210, and the third flow passage 500 furtherincludes a communication portion 520 and a throttle portion 510.Accordingly, the second opening portion 3210 has a wall 3212 forming thecommunication portion and a wall 3211 forming the throttle portion. Thethird flow passage 500 is provided with a first opening 501 of the thirdflow passage 500 in the second bottom wall 222 and/or the firstsub-portion 230 in the axial direction of the conduction pipe 700. Inone technical solution of the present disclosure, the communicationportion 520 is provided with a second opening of the third flow passage500 in the outer wall of the valve body 3000, the throttle portion 510is provided with the first opening 501 of the third flow passage 500 inthe side wall of the second chamber 200. Alternatively, the firstopening 501 of the third flow passage 500 may be formed in the bottomwall of the second chamber 200 and/or the first sub-portion 230. In acase that the first opening of the third flow passage 500 is formed inthe first sub-portion 230, the first opening 501 of the third flowpassage 500 should be as close as possible to the second bottom wall222, so as to facilitate the liquid fluid flowing into the third flowpassage 500. In other embodiments of the technical solution of thepresent disclosure, the third flow passage 500 may not be provided withthe throttle portion, and the third flow passage 500 only includes thecommunication portion 520. In that case, the third flow passage 500 onlyhas a conducting function.

Referring to FIGS. 1, 3, 39, 12 and 13, the valve body 3000 includes afirst valve body 3100 and a second valve body 3200. The transmissiondevice 2000 is arranged to be fixed to the first valve body 3100. Thefirst opening portion 3110, the first passage 3120, the first flowpassage 300 and the second flow passage 400 are formed in the firstvalve body 3100, and at least part of the third flow passage 500 areformed in the second valve body 3200. With reference to FIG. 12 and FIG.13, the first valve body 3100 includes a first wall 3101, the secondvalve body 3200 includes a second wall 3201, and the first wall 3101 isarranged in contact or with a gap to the second wall 3201. Theexpression “arranged with a gap” here means that a distance between thefirst wall 3101 and the second wall 3201 is less than or equal to 5cm.In addition, it also belongs to the case of “arranged with a gap” ifother components are provided between the first wall 3101 and the secondwall 3201. The second chamber 200 includes a first sub-chamber 210 and asecond sub-chamber 220. The first sub-chamber 210 is formed in the firstvalve body 3100, the second sub-chamber 220 is formed in the secondvalve body 3200, and the first sub-chamber 210 is arranged opposite tothe second sub-chamber 220. The fluid management assembly 10 includes afirst gap 3150 and a first sealing member, the first gap 3150 is formedas a groove, the first gap 3150 is arranged in the first wall 3101 andrecessed from the first wall 3101, and the first gap 3150 surrounds anopening of the first sub-chamber 210 in the first wall 3101, or in otherwords, the opening of the first sub-chamber 210 in the first wall 3101is arranged inside the first gap 3150. The first sealing member isarranged in the first gap 3150. After the first valve body 3100 and thesecond valve body 3200 being mounted, the first sealing member abutsagainst a wall of the first gap 3150 and the second wall 3201,respectively, so as to seal the second chamber 200, thereby avoiding thefluid in the second chamber 200 from leakage. Alternatively, the firstgap 3150 may be formed in the second wall 3201, or formed both in thefirst wall 3101 and the second wall 3201, which will not be described indetail. In other embodiments, referring to FIGS. 23, 24 and 26, thefirst valve body 3100 includes an embedded portion 3190, an opening ofthe first sub-chamber 210 is formed in the embedded portion 3190, andthe embedded portion 3190 protrudes relative to the first wall 3101.Correspondingly, the second valve body 3200 includes a step portion3290, the step portion 3290 includes a side wall of step 3291 and abottom wall of step 3292, the side wall of step 3291 extends from thesecond wall 3201 toward the bottom wall of step 3292, and the bottomwall of step 3292 is parallel to the second wall 3201. The embeddedportion 3190 is arranged at the step portion, and the first gap 3150 isprovided between the embedded portion 3190 and the step portion. Thefluid management assembly 10 is provided with the first sealing memberin the first gap 3150, so as to realize the sealing between the embeddedportion 3190 and the step portion, the sealing of the second chamber200, and avoid the fluid in the second chamber 200 from leakage.Alternatively, the embedded portion 3190 may be arranged in the secondvalve body 3200, and the step portion may be arranged in the first valvebody 3100, which will not be described in detail.

The first valve body 3100 includes a first through hole 3130, the firstthrough hole 3130 is provided with a first opening of the first throughhole 3130 in the wall of the first opening portion, the first throughhole 3130 is provided with a second opening of the first through hole3130 in the first wall 3101, and the first opening of the first throughhole 3130 is arranged opposite to the opening of the second hole 4120,or in other words, the first opening of the first through hole 3130 isarranged opposite to the second opening of the first communicationpassage 4300, and the first through hole 3130 is in communication withthe first communication passage 4300. The second valve body 3200includes a second through hole 3220, the second through hole 3220 isprovided with a first opening of the second through hole 3220 in thesecond wall 3201, the second through hole 3220 is provided with a secondopening of the second through hole 3220 in the second opening portion3210, the second through hole 3220 is in communication with a chamberformed by the second opening portion 3210, the first opening of thefirst through hole 3130 is arranged opposite to the first opening of thesecond through hole 3220, and the first through hole 3130 is incommunication with the second through hole 3220.

The fluid management assembly 10 further includes the fourth flowpassage, which can be in communication with the first chamber 100. Inthis embodiment, the fourth flow passage includes the passage 6110 ofthe first valve seat, the first communication passage 4300, the firstthrough hole 3130 and the second through hole 3220, and an opening ofthe fourth flow passage is arranged in the wall 3212 of thecommunication portion, or in other words, the fluid in the fourth flowpassage enters the third flow passage 500 and then is discharged throughthe third flow passage 500. Referring to FIG. 12 and FIG. 13, the fluidmanagement assembly 10 further includes a second gap 3140 and a secondsealing member, and the second sealing member is arranged in the secondgap 3140, so as to achieve sealing. In this embodiment, the second gap3140 is formed as a groove and arranged in the first wall 3101 andrecessed from an end of the first wall 3101, and the second gap 3140surrounds an outer circumference of the second opening of the firstthrough hole 3130, or in other words, the second opening of the firstthrough hole 3130 is arranged inside the second gap 3140. The secondsealing member is provided in the second gap 3140, and the secondsealing member abuts against a wall of the second gap 3140 and thesecond wall 3201, respectively. The second sealing member may be of asealing ring or a solder, so as to prevent internal being leakage.Alternatively, the second gap 3140 may be formed in the second wall3201, or the second wall 3201 may be formed in the first wall 3101 andthe second wall 3201, and the second gap 3140 of the first valve body3100 may be arranged opposite to or staggered with the second gap 3140of the second valve body 3200, which will not be described in detail.

In other embodiments, referring to FIG. 23 and FIG. 24, the fluidmanagement assembly 10 further includes a first connecting pipe 3170,which is integrated with one of the first valve body 3100 and the secondvalve body 3200, such that one end of the first connecting pipe 3170 isarranged in the first through hole 3130 or the second through hole 3220and forms a second gap 3140 therewith, and the second sealing member isarranged in the second gap 3140, which facilitates assembly and reducethe risk of leakage. In this embodiment, the first connecting pipe 3170is integrated with the first valve body 3100. In other embodiments, thefirst connecting pipe 3170 is separately arranged with the first valvebody 3100 and the second valve body 3200, one end of the firstconnecting pipe 3170 is arranged in the first through hole, and theother end of the first connecting pipe 3170 is arranged in the secondthrough hole. A second gap is provided between the first connecting pipe3170 and the first through hole, and a second gap is present between thefirst connecting pipe 3170 and the second through hole, the fluidmanagement assembly 10 is provided with the second sealing member in thesecond gap 3140, so as to realize the sealing between the firstconnecting pipe 317 and the first through hole and between the firstconnecting pipe 317 and the second through hole.

In order to secure the first valve body 3100 and the second valve body3200, in this embodiment, a first mounting hole is provided in one ofthe first valve body 3100 and the second valve body 3200, and a firstpenetrating through hole is provided in other one of the first valvebody 3100 and the second valve body 3200, so as to cooperate with thefirst mounting hole. Generally, an axis of the first mounting hole isparallel to the axis of the conduction pipe 700. The fluid managementassembly 10 further includes a first fastener, the first fastenerextends into the first penetrating through hole and the first mountinghole, and the first valve body 3100 and the second valve body 3200 arefastened by the first fastener. Under the action of the first fastener,the first wall closely abuts against the second wall, or the first wallclosely abuts against the second wall by other members and is secured tothe second wall by another fastener, and the fastener may include acomponent such as a bolt, etc. for fastening.

Referring to FIG. 17, the first communication passage 4300 includes achamber of the first hole 4110 and a chamber of the second hole 4120.The axis of the first hole 4110 coincides with the axis of the secondhole 4120. Alternatively, the axis of the first hole 4110 may bearranged parallel to the axis of the second hole 4120, and the chamberof the first hole 4110 is in communication with the chamber of thesecond hole 4120. The opening of the second hole 4120 is formed in theouter end wall 4010 of the valve bonnet, that is, an opening of thefourth flow passage in the outer end wall of the valve bonnet, or inother words, a fourth connecting port 4, so that the first through hole3130 does not need to be provided in the first valve body 3100, and thesecond through hole 3220 does not need to be provided in the secondvalve body 3200, which facilitates mounting and reducing internalleakage. In that case, the fourth flow passage 600 includes the passageof the first valve seat 6100 and the first communication passage 4300,and the fourth flow passage does not need to share an outlet with thethird flow passage. When the fluid management assembly is throttled andconducted at the same time, the fluid in the third flow passage and thefluid in the fourth flow passage cannot be mixed. In this embodiment,the fluid management assembly includes a first groove and a sealingmember, the sealing member is arranged in the first groove, and thefirst groove is recessed relative to the side wall of the valve bonnetand distributed in a circumferential direction of the side wall of thevalve bonnet, or the first groove is recessed relative to the firstopening portion and distributed in a circumferential direction of thefirst opening portion. The fluid management assembly 10 includes a valveport portion and a second valve core, the third flow passage 500includes a chamber formed by the valve port portion, or in other words,the chamber formed by the valve port portion is a part of the third flowpassage 500, and the second valve core can abut against the valve portportion, so as to block the third flow passage 500. In this embodiment,referring to FIGS. 3, 14 and 15, the fluid management assembly 10further includes a check valve component 7000, and the check valvecomponent 7000 is arranged in the chamber formed by the second openingportion 3210. Specifically, the second opening portion 3210 is providedwith a mounting portion 3213, and the mounting portion 3213 is arrangedbetween the communication portion 520 and the throttle portion 510. Thecheck valve component 7000 includes a valve supporting seat 7100 and asecond valve core 7200, at least part of the valve supporting seat 7100is arranged in a chamber formed by the mounting portion 3213, and themounting portion 3213 is fixedly connected to the valve supporting seat7100 and a connection between the mounting portion and the valvesupporting seat 7100 is sealed. In a specific embodiment, the matchingportion 3111 is provided with an internal thread in the first openingportion 3110, the mounting portion 3213 has an internal thread, amatching portion of the valve supporting seat 7100 is formed as anexternal thread, and the internal thread of the mounting portion 3213cooperates with the external thread of a fixing portion, so as to securethe check valve component 7000 with the second opening portion 3210. Agroove for placing a sealing member is provided in the matching portionof the valve supporting seat 7100 or the mounting portion 3213, so as torealize the sealing between the valve supporting seat 7100 and thesecond opening portion 3210. In other embodiments, the mounting portion3213 has a step for limiting the valve supporting seat 7100 and a groovefor placing a snap ring, and the step and the snap ring of the mountingportion 3213 are configured to realize the fixation of the valvesupporting seat 7100. The valve supporting seat 7100 includes a hole forvalve core stem, a communication hole 7110 and a stop portion 7130, andthe valve supporting seat 7100 is further provided with a valve portportion 7120. The valve port portion 7120 is arranged at a side of thevalve supporting seat 7100 close to the communication portion 520, andthe stop portion 7130 is arranged at a side of the valve supporting seat7100 close to the throttle portion 510. Both the hole for valve corestem and the communication hole 7110 extend through the valve supportingseat 7100 in an axial direction of the second opening portion 3210. Thesecond valve core 7200 includes a valve core stem 7230, a first end 7210and a second end 7220, and the first end 7210 and the second end 7220are arranged integrally or welded into a whole with the valve core stem7230. Both the first end 7210 and the second end 7220 protrude relativeto the valve core stem 7230 in the axial direction of the second openingportion 3210, or in other words, outer diameters of the first end 7210and the second end 7220 are greater than an outer diameter of the valvecore stem 7230, the valve core stem 7230 is arranged in the valve corestem hole, and the valve core stem 7230 is slidable in the valve corestem hole. The first end 7210 and the second end 7220 are arranged attwo sides of the valve supporting seat 7100, the first end 7210 isrelatively adjacent to the communication portion 520, and the second end7220 is relatively adjacent to the throttle portion 510. One end of anelastic member 7300 abuts against the second end 7220, and the other endof the elastic member 7300 abuts against the stop portion 7130. Thecheck valve component 7000 is provided with the elastic member 7300,which facilitates the resetting of the second valve core 7200. In thisembodiment, the elastic member 7300 is of a spring. The first end 7210has a first abutment area 7211, the communication hole 7110 has acommunication port in an outer end wall of the valve supporting seat7100, and the valve port portion 7120 is distributed in acircumferential direction of the communication port. In otherembodiments, the valve port portion 7120 may be formed as a wall of thecommunication portion. When the fluid management assembly is inoperation, in a case that a pressure of the throttle portion 510 islower than a pressure of the communication portion 520, the second valvecore 7200 is arranged in a first position, the first abutment area 7211abuts against the valve port portion 7120, and the communication hole7110 is not in communication with the communication portion 520, so thatthe third flow passage 500 is blocked; in a case that the pressure ofthe throttle portion 510 is higher than the pressure of thecommunication portion 520, the second valve core 7200 is arranged in asecond position, the first abutment area 7211 is separated from thevalve port portion 7120, the elastic member 7300 is poressed by thesecond end, the second valve core is limited by the stop portion fromfurther moving toward the communication portion, the valve port portion7120 is opened by the second valve core 7200, the communication hole isin communication with the communication portion 520, so that the thirdflow passage 500 is conducted.

Referring to FIGS. 38 to 42 and FIG. 3, when the fluid managementassembly 10 is in operation, the first valve core 5000 is rotatable inthe first chamber 100, an operation position of the first valve core5000 at least includes a first operation position and a second operationposition. In the technical solution of this embodiment, the first flowpassage 300 serves as a passage for the fluid to enter the first chamber100, and the fourth flow passage serves as one of the passages for thefluid to flow out of the first chamber 100. The fourth flow passageincludes the passage 6110 of the first valve seat, the chamber of thefirst hole 4110, the chamber of the second hole 4120, a chamber of thefirst through hole 3130 and a chamber of the second through hole 3220.The first communication passage 4300 includes the chamber of the firsthole 4110 and the chamber of the second hole 4120; the first passage3120 is another passage for the fluid to flow out of the first chamber100, and the fluid in the first chamber 100 can enter the second chamber200 through the first passage 3120. After the fluid in the secondchamber 200 being gas-liquid separated, the second flow passage 400serves as a passage for the gas to flow out of the second chamber 200,and the third flow passage 500 serves as a passage for the liquid toflow out of the second chamber 200. Specifically, referring to FIG. 40and FIG. 3, the fluid enters the first chamber 100 through the firstflow passage 300. In the first operation position of the first valvecore 5000, the conduction passage 5200 of the first valve core is incommunication with the passage 6110 of the first valve seat, the firstvalve core 5000 blocks a passage between the first chamber 100 and thepassage of the second valve seat 6200, so that the second chamber 200 isnot in communication with the first chamber 100, the fluid in the firstchamber 100 leaves the first chamber 100 through the fourth flowpassage, and enters the communication portion 520 of the third flowpassage 500, and then is discharged from the fluid management assembly10 through the communication portion 520, and the fluid managementassembly 10 is only a passage of the fluid in that case. In the secondoperation position of the first valve core 5000, referring to FIG. 3 andFIG. 41, the first chamber 100 is in communication with the secondchamber 200, the throttle passage 5100 of the first valve core 5000communicates a passage between the first chamber 100 and the secondvalve seat 6000, the fluid in the first chamber 100 enters the secondchamber 200 after being throttled by the throttle passage 5100, and thethrottled fluid is gas-liquid separated in the second chamber 200, thegaseous fluid enters the second flow passage 400 through the conductionpipe 700 and is discharged out of the fluid management assembly 10, andthe liquid fluid enters the third flow passage 500 through the firstopening 501 of the third flow passage and is discharged out of the fluidmanagement assembly 10 through the third flow passage 500. In that case,the fluid management assembly 10 has throttling and gas-liquidseparation functions. In a case that the third flow passage 500 furtherincludes the throttle portion 510, the fluid management assembly 10further has a secondary throttling effect on the fluid.

In other embodiments, the operation position of the first valve core5000 of the fluid management assembly 10 further includes a thirdoperation position and a fourth operation position. In the thirdoperation position of the first valve core 5000, referring to FIG. 39and FIG. 3, the first valve core 5000 blocks the first chamber 100 notto be in communication with the passage of the second valve seat 6200,and the throttle passage 5100 communicates the first chamber 100 withthe passage 6110 of the first valve seat. Further, the first chamber 100is in communication with the fourth flow passage through the throttlepassage 5100. The fluid in the first chamber 100 enters the fourth flowpassage after being throttled through the throttle passage 5100, thenenters the communication portion 520 of the third flow passage 500, andis then discharged out of the fluid management assembly 10 through thecommunication portion 520. The fourth flow passage includes the passage6110 of the first valve seat, the chamber of the first hole 4110, thechamber of the second hole 4120, the chamber of the first through hole3130 and the chamber of the second through hole 3220. In the fourthoperation position of the first valve core 5000, referring to FIG. 42and FIG. 3, the first valve core 5000 blocks the first chamber 500 notto be in communication with the passage 6110 of the first valve seat,the throttle passage 5100 communicates the first chamber 100 with thepassage of the second valve seat 6200. Further, the first chamber 100 isin communication with the second chamber 200. The fluid entering thesecond chamber 200 is gas-fluid separated, the gaseous fluid isdischarged out of the fluid management assembly 10 through the secondflow passage 400, and the liquid fluid is discharged out of the fluidmanagement assembly 10 through the third flow passage 500. In that case,the fluid management assembly 10 has throttling and gas-liquidseparation functions. In a case that the third flow passage 500 furtherincludes the throttle portion 510, the fluid management assembly 10further has a secondary throttling effect on the fluid.

Referring to FIG. 27 and FIG. 28, the second valve body 3200 includes athird opening portion 3240, and the third opening portion 3240 isrecessed relative to a wall of the second valve body 3200. In thisembodiment, the third opening portion 3240 is recessed from a wall ofthe second valve body toward the second wall 3201, the third openingportion 3240 includes a large-diameter portion 3241, a small-diameterportion 3242 and a flat portion 3243, the flat portion 3243 connects thelarge-diameter portion 3241 and the small-diameter portion 3242, and thesmall-diameter portion 3242 has an opening in the wall of thecommunication portion 520. In this embodiment, the third flow passage500 includes a second passage 3250, the second passage 3250 is providedwith a first opening 501 of the third flow passage 500 in the wall ofthe second chamber 200, the second passage 3250 has an opening in thethird opening portion, the second passage 3250 communicates a chamberformed by the second chamber 200 and the third opening portion 3240, andan axis of the second passage 3250 is arranged to be inclined relativeto the axis of the conduction pipe. Referring to FIG. 27, at least partof the second passage 3250 is formed as a throttle portion, anequivalent diameter of the throttle portion is about 1.4 mm, or it maybe in other sizes, as long as it can realize the fluid throttling. Thefluid management assembly further includes a solenoid valve portion anda valve chamber, the solenoid valve portion includes a valve supportingseat 7100′ and a sleeve portion 8600, the valve supporting seat 7100′ isprovided with a center hole extending through the valve supporting seat,one end of the valve supporting seat 7100′ is fixedly connected to thethird opening portion 3240 and a connection between the valve supportingseat 7100′ and the third opening portion 3240 is sealed, and the fixingmanner may be welding or screw fixing. The solenoid valve portionincludes a second valve core 7200′ and an elastic member 7300′. In thisembodiment, the second valve core 7200′ is of a piston, the piston has apiston hole, and the piston is slidable in the valve chamber. In thisembodiment, a wall forming the valve chamber includes a partial wall ofthe large-diameter portion 3241 and a wall of the valve supporting seat7100′. The valve supporting seat 7100′ includes a guiding wall, at leastpart of the piston is arranged in a chamber formed by the guiding wall,the guiding wall of the valve supporting seat 7100′ is slidablyconnected to a side wall of the piston, and the other part of the pistonis arranged in a chamber enclosed by the large-diameter portion 3241.One end of the elastic member 7300′ abuts against the flat portion 3243,and the other end of the elastic member 7300′ abuts against the piston.The fluid management assembly 10 further includes a coil assembly 8500and an iron core assembly. The iron core assembly includes a moving ironcore 9200, a static iron core 9300 and a sleeve portion 8600, and oneend of the sleeve portion is arranged in a center hole of the valvesupporting seat 7100′ and is sealingly fixed to a hole wall of thecenter hole of the valve supporting seat 7100′. At least part of thestatic iron core 9300 is arranged in the sleeve portion and fixed to thesleeve portion, at least part of the moving iron core 9200 is arrangedin the sleeve portion and is movable relative to the static iron core9300, and the moving iron core 9200 can relatively seal the piston hole.The static iron core 9300 is farther away from the valve supporting seat7100′ than the moving iron core 9200, and the coil assembly 8500 issleeved on an outer circumference of the sleeve portion 8600. When thefluid management assembly is in operation, after the coil assembly 8500being energized, the excitation magnetic field generated by the coilassembly 8500 can drive the moving iron core 9200 to move, the movingiron core 9200 abuts against the piston and relatively seals the pistonhole, the piston is moved toward the valve port portion, and the pistonseals the valve port portion, so that the communication portion 520 isnot in communication with the second chamber 200. In this embodiment,the valve port portion is the flat portion 3242 or a wall of thesmall-diameter portion 3242. In a case that the fluid flows out of thesecond chamber through the third flow passage, the second passage has athrottling effect, and the solenoid valve portion opens the third flowpassage. In other cases, when the pressure of the communication portionis higher than the pressure of the throttle portion, the solenoid valveis closed.

Referring to FIG. 28, compared with the technical solution shown in FIG.27, the difference is in that: the second passage 3250 is formed as thecommunication portion 520 or a part of the communication portion 520, anequivalent diameter of the second passage is about 3 mm, or theequivalent diameter may be other sizes. In this embodiment, the secondvalve core 7200″ is of a valve needle, or the second valve core 7200″may be in other forms of valves. The fluid management assembly 10further includes a transmission mechanism 8300, a rotor portion 8400 anda valve core guiding portion. In this embodiment, the transmissionmechanism 8300 is a thread-driving transmission mechanism, thethread-driving transmission mechanism includes a movable portion and afixed portion, one of the movable portion and the fixed portion includesa screw rod, and the other one of the movable portion and the fixedportion includes a nut threaded with the screw rod, the movable portionis assembled with the valve needle, and the fixed portion can bedirectly or indirectly fixed to the valve seat. The valve core guidingportion is relatively fixed to the valve supporting seat 7100″ and canguide the second valve core 7200″, so as to prevent an axial movement ofthe second valve core 7200″ from deviating. The valve port portion isformed in the valve supporting seat 7100″, and in other embodiments, itmay be formed in the valve core guiding portion. Alternatively, thevalve port portion may be formed in the small-diameter portion 3242, andthe second valve core 7200″ is substantially coaxial with the valve portportion. When the fluid management assembly 10 is in operation, the coilassembly 8500 is electrically connected to a control circuit whichcontrols the coil assembly 8500. When the coil assembly 8500 isenergized, the excitation magnetic field generated by the coil assembly8500 can drive the rotor portion 8400 to rotate, and further drive thevalve needle to move by the thread-driving transmission mechanism 8300.When the rotor portion 8400 rotates, the screw rod is driven by therotor portion 8400 to rotate relative to the nut due to the effect ofpitch, so as to realize the rotation and axial movement. In addition,the valve needle is relatively fixed to the screw rod, so that the valveneedle can move axially with the screw rod, and a gap between the valveneedle and the valve port portion becomes larger or smaller, and thethrottling to refrigerant is realized. It can be known that a gapbetween the second valve core 7200″ and the valve port portion is formedas a throttle portion. Alternatively, the transmission mechanism 8300may be a gear-driving transmission mechanism 8300, the second valve coremay have a spherical or quasi-spherical structure, and the movement ofthe second valve core relative to the valve seat or a connecting bodymay be in a relative rotation.

Referring to FIG. 29 and FIG. 30, compared with the embodiment shown inFIG. 17, the valve body 3000 includes a main body 3300 and a block body3400, the main body 3300 includes the first opening portion 3110, thesecond opening portion 3210 and the first flow passage 300, and thefirst flow passage 300 is provided with the first connecting port 1 onan outer wall of the main body 3300. The main body 3300 includes afourth opening portion 3310, the fourth opening portion 3310 is recessedfrom an upper wall of the main body 3300 toward an interior of the mainbody 3300, the fourth opening portion 3310 has an opening on the upperwall of the main body 3300, and the fourth opening portion 3310 includesa mounting wall 3311 and a side wall 3312 of the second chamber. Themounting wall 3311 is relatively close to the opening of the fourthopening portion, and the first passage 3120 is provided with the firstopening 3121 of the first passage 3120 on the side wall 3312 of thesecond chamber. The second flow passage extends through the block body3400, the block body 3400 has a matching wall, and the matching wall ofthe block body 3400 is sealingly fixed to the mounting wall 3312.Specifically, the matching wall of the block body 3400 has an externalthread, the mounting wall is formed as an internal thread, and theexternal thread of the block body 3400 cooperates with the internalthread of the mounting wall, so as to realize the fixation of the blockbody 3400 and the main body 3300. A gap is present between the blockbody 3400 and the mounting wall, and a sealing member is arranged in thegap, so as to realize the sealing between the block body 3400 and themounting wall. The conduction pipe 700 is integrated with the block body3400, or the block body 3400 may be separately arranged with theconduction pipe 700. In this embodiment, the valve bonnet 4000 includesthe first communication passage 4300, the first communication passage4300 has the opening on the inner end wall of the valve bonnet 4000, andthe first communication passage 4300 has a fourth connecting port 4 onan outer end wall 4010 of the valve bonnet. In another embodiment, thefourth opening portion is recessed from a lower wall of the main body3300 toward the interior of the main body, the fourth opening portion3310 has an opening on the lower wall of the main body 3300, an innerwall of the block body 3400 is formed as the bottom wall of the secondchamber, a bottom wall of the fourth opening portion is formed as thetop wall of the second chamber, and the second flow passage is formed inthe main body. The valve body includes the main body 3300 and the blockbody 3400, compared with the solution shown in FIG. 3, the processingand assembly are relatively simple.

Referring to FIGS. 19 to 26, the difference from the solution shown inFIG. 3 is that: the first connecting port 1 is formed on the secondvalve body 3200, the opening of the first flow passage 300 on the wallof the first chamber 100 is arranged on a lower side of the first valvecore 5000, that is, a side opposite to the valve stem 2300, which canreduce the lateral impact of the fluid on the first valve core 5000, andis beneficial to maintaining the stability of the first valve core 5000.Specifically, the first flow passage 300 includes a first sub flowpassage 310 and a second sub flow passage 320. The first sub flowpassage 310 is arranged in the first valve body 3100, the second subflow passage 320 is arranged in the second valve body 3200, the firstsub flow passage 310 has openings on the first wall 3101 and the firstopening portion 3110, the first sub flow passage 310 is provided with afirst opening of the first sub flow passage 310 on the first wall 3101,the first sub flow passage 310 is provided with a second opening of thefirst sub flow passage 310 on the wall of the first chamber 100, thesecond opening of the first sub flow passage 310 and the valve stem 2300are arranged on the two sides of the first valve core 5000, the firstsub flow passage is in communication with the first chamber 100, so thatwhen the fluid in the first flow passage enters the first chamber, thelateral impact on the first valve core is reduced, which is beneficialto the stability of the first valve core. The “lateral” here refers to adirection perpendicular to the valve stem. The second sub flow passage320 is provided with a first opening of the second sub flow passage 320on the second wall 3201, and the second sub flow passage 320 also has anopening on an outer wall of the second valve body 3200. In thisembodiment, the first valve body 3100 includes a first hole portion3160, a chamber of the first hole portion 3160 forms part of the firstsub flow passage 310, the second valve body 3200 includes a second holeportion 3230, a wall forming the second sub flow passage 320 includesthe second hole portion 3230 and a third hole portion 3270, and thesecond hole portion 3230 is recessed from the second wall 3201 towardthe interior of the second valve body 3200, or in other words, a chamberformed by the second hole portion 3230 is provided with the firstopening of the second sub flow passage 320 on the second wall 3201. Thethird hole portion 3270 has an opening on a side wall of the secondvalve body, and the chamber formed by the second hole portion 3230 is incommunication with a chamber formed by the third hole portion 3270. Inthis embodiment, an axis of the second hole portion 3230 isperpendicular to an axis of the third hole portion 3270, or the axis ofthe second hole portion 3230 may form another included angle with theaxis of the third hole portion 3270. The fluid management assemblyincludes a third gap 3260 and a third sealing member, and the thirdsealing member is arranged in the third gap 3260. The fluid managementassembly includes a second connecting pipe 3180, the second connectingpipe 3180 is integrated with the first valve body 3100, one end of thesecond connecting pipe 3180 is arranged in the chamber formed by thesecond hole portion 3230, the second hole portion 3230 forms the thirdgap 3260 with the second connecting pipe, and the second connecting pipe3180 is integrally formed with the first valve body 3100, whichfacilitates assembly and reduces the risk of leakage. Alternatively, thesecond connecting pipe 3180 may be integrated with the second valve body3200, which will not be described in detail. In other embodiments, oneend of the second connecting pipe 3180 is located in the first holeportion 3160, the other end of the second connecting pipe is arranged inthe second hole portion 3230, a third gap is present between the secondconnecting pipe 3180 and the first hole portion 3160, and a third gap3260 is present between the second connecting pipe 3180 and the secondhole portion 3230, and the fluid management assembly 10 is provided withthe third sealing members in the third gaps 3260, so as to realize thesealing between the second connecting pipe 3180 and the first holeportion 3160 and between the second connecting pipe 3180 and the secondhole portion 3230. It can be known that the fluid management assembly 10may not include the second connecting pipe, the third gap 3260 is formedas a groove, the third gap 3260 is recessed relative to the first wall,the third gap 3260 surrounds an outer circumference of the first openingof the first hole portion 3160, or in other words, the first opening ofthe first hole portion 3160 is arranged inside the third gap 3260. Thethird sealing member is provided in the third gap 3260, and the thirdsealing member respectively abuts against a wall of the third gap 3260and the second wall 3201. The third sealing member may be a sealing ringor a solder, so as to prevent internal leakage. Alternatively, the thirdgap 3260 may be formed on the second wall 3201, or the third gap 3260may be both formed on the first wall 3101 and the second wall 3201. Thethird gap 3260 of the first valve body 3100 may be arranged opposite toor staggered with the third gap 3260 of the second valve body 3200,which will not be described in detail. The second valve body furtherincludes a fourth hole portion 3280, the fourth hole portion 3280 isprovided with the third connecting port 3 on the outer wall of thesecond valve body 3200, an axis of the fourth hole portion 3280 isperpendicular to the axis of the second opening portion 3210, and achamber formed by the fourth hole portion 3280 is in communication withthe chamber formed by the second opening portion 3210. Accordingly, thefluid management further places a plug on the fourth opening portion, soas to prevent the fluid from flowing out of the opening of the secondopening portion. In this embodiment, the third connecting port 3 and thefirst connecting port 1 are arranged on the same outer wall of thesecond valve body, which facilitates the communication between the fluidmanagement assembly and other components. The third flow passageincludes the chamber formed by the second opening portion 3210 and thechamber formed by the fourth hole portion 3280. The chamber formed bythe fourth hole portion 3280 is in communication with the chamber formedby the second through hole 3220, so that the fourth flow passage is incommunication with the third flow passage.

A thermal management system will be described below. Referring to FIG.31, in a specific embodiment of the thermal management system, a vehiclethermal management system is taken as example, and the fluid in thethermal management system is generally a refrigerant. The thermalmanagement system includes a compressor 40, a fluid management assembly10, a first heat exchanger 20 and a second heat exchanger 50. Thecompressor 40 includes an outlet 41, a first inlet 42 and a second inlet43. The first inlet 42 is a low-pressure inlet, and the second inlet 43is a relatively high-pressure inlet. The first heat exchanger 20 can bein communication with the outlet 41 of the compressor, and ahigh-temperature and high-pressure refrigerant releases heat in thefirst heat exchanger 20 to heat gas flowing through the first heatexchanger 20, which increases the temperature of the airflow. The secondheat exchanger 50 is arranged at a front end of a vehicle, and the frontend of the vehicle here refers to a position of the second heatexchanger 50 capable of exchanging heat with ambient air. Specifically,the refrigerant can release heat to or absorb heat from the ambient airin the second heat exchanger 50, and the second heat exchanger 50 canexchange heat with the ambient air. The thermal management systemfurther includes a third heat exchanger 30, and a throttling unit 70 isarranged in front of a refrigerant inlet of the third heat exchanger 30.The refrigerant absorbs the heat of the airflow flowing through thethird heat exchanger 30 after the refrigerant is throttled by thethrottling unit 70, which reduces the temperature of the airflow. Thefirst heat exchanger 20 and the third heat exchanger 30 are arranged inan air duct of an air-conditioning case of the vehicle, and the firstheat exchanger 20 is arranged in a downwind direction of the third heatexchanger 30. When the thermal management system is in operation, therefrigerant in the first heat exchanger 20 and the refrigerant in thethird heat exchanger 30 exchange heat with the airflow in theair-conditioning case, which adjusts the temperature of the airflow inthe air-conditioning case, and further adjusts the temperature of apassenger compartment. The structure and description of the fluidmanagement assembly 10 can make reference to FIGS. 1 to 30 and the abovedescription, which will not be described in detail. Referring to FIGS.31, 3 and 39, in the technical solution of the this embodiment, arefrigerant outlet of the first heat exchanger 20 is in communicationwith the first connecting port 1 of the fluid management assembly, thesecond inlet 43 of the compressor is in communication with the secondconnecting port 2 of the fluid management assembly 10, a first port ofthe second heat exchanger 50 is in communication with the thirdconnecting port 3 of the fluid management assembly 10, and a second portof the second heat exchanger 50 can be in communication with the firstinlet 42 of the compressor 40 or with the first inlet 42 of thecompressor 40 through a gas-liquid separator 80. In this embodiment, thethermal management system is provided with a shut-off valve 60, theshut-off valve 60 is arranged between the second port of the second heatexchanger 50 and the first inlet 42 of the compressor, so as to controlwhether the second port of the second heat exchanger 50 is incommunication with the first inlet 42 of the compressor or not. Thesecond port of the second heat exchanger 50 can also be in communicationwith the third heat exchanger 30 through the throttling unit 70, and arefrigerant outlet of the third heat exchanger 30 is in communicationwith the first inlet 42 of the compressor or with the first inlet 42 ofthe compressor via the gas-liquid separator 80. The thermal managementsystem further includes a temperature flap. In a direction of theairflow, the temperature flap is arranged between the first heatexchanger 20 and the second heat exchanger 50, and the temperature flapcan open or close or adjust a heat exchange area of the first heatexchanger 20, so as to control the heat exchange amount of the firstheat exchanger 20.

In other embodiments, the thermal management system further includes arefrigerant system, a first coolant system and/or a second coolantsystem. The first heat exchanger 20 and/or the second heat exchanger 50are/is a dual-passage exchanger, one of the flow passages is arefrigerant flow passage, and the refrigerant flow passage is a part ofthe refrigerant system, and the other one of the flow passages is acoolant flow passage. The first coolant system includes a coolant flowpassage of the first heat exchanger 20, a first pump 201 and a fourthheat exchanger 202, the coolant flow passage of the first heat exchanger20, the first pump 201 and the fourth heat exchanger 202 arecommunicated in series, and the fourth heat exchanger 202 is arranged inthe air duct of the air-conditioning case. The second coolant systemincludes a coolant flow passage of the third heat exchanger 30, a secondpump 301 and a fifth heat exchanger 302, the coolant flow passage of thethird heat exchanger 30, the second pump 301 and the fifth heatexchanger 302 are communicated in series, and the fifth heat exchanger302 is arranged in the air duct of the air-conditioning case. Taking thefirst coolant system as an example, the refrigerant of the refrigerantsystem exchanges heat with the coolant of the first coolant system inthe first heat exchanger 20, so as to adjust the temperature of thecoolant of the first coolant system, and the coolant of the firstcoolant system exchanges heat with the airflow in the air-conditioningcase in the fourth heat exchanger 202, so as to adjust the temperatureof the airflow in the air-conditioning case, which further adjusts thetemperature of the passenger compartment. Similarly, the situation ofthe second coolant system is the same as the above content, which willnot be described in detail. Referring to FIG. 33, the embodiment shownin FIG. 33 is a case where the thermal management system includes therefrigerant system, the first coolant system and the second coolantsystem. In this embodiment, the fourth heat exchanger 202 is arranged ina downwind direction of the fifth heat exchanger 302, and the first pump201 and the second pump 301 are used to control whether the firstcoolant system and the second coolant system participate in heatexchange.

The thermal management system includes a heating mode and a coolingmode, and the heating mode includes at least one of a first heatingmode, a second heating mode and a third heating mode. Referring to FIG.34 and FIG. 41, in the first heating mode of the thermal managementsystem, the first valve core is in the second operation position, thatis, the first chamber 100 is in communication with the second chamber200. Specifically, the first chamber 100 is in communication with thesecond chamber 200 through the throttle passage 5100. The refrigerantwith high-temperature and high-pressure releases heat in the first heatexchanger 20, and the refrigerant which releases heat in the first heatexchanger 20 enters the first flow passage 300 through the firstconnecting port 1 and then enters the first chamber 100 through thefirst flow passage 300. Due to the throttling of the throttle passage5100, the gas-liquid mixed refrigerant is gas-fluid separated in thesecond chamber 200, the gaseous refrigerant flows through the secondflow passage 400, enters the second inlet 43 of the compressor throughthe second connecting port 2, and is involved in the next cycle. Theliquid refrigerant in the second chamber 200 passes through the thirdflow passage 500 and enters the first port of the second heat exchanger50 through the third connecting port 3, the refrigerant evaporates andabsorbs heat in the second heat exchanger 50, and the refrigerant whichhas absorbed heat enters the first inlet 42 of the compressor or entersthe first inlet 42 of the compressor via the gas-liquid separator 80. Inthis embodiment, the fluid management assembly 10 has the throttling andgas-liquid separation functions. The gaseous refrigerant in the secondchamber enters the second inlet 43 of the compressor, which has theeffect of supplementing gas and increasing enthalpy, and is beneficialto improving the heating performance of the thermal management assembly.It should be emphasized here that the first heating mode includes atleast two cases as following: in the first case, the third flow passage500 only includes the communication portion 520, that is, the third flowpassage only has a function of communicating, the refrigerant in thesecond chamber 200 enters the communication portion with the pressure ofthe refrigerant being constant or with a small pressure difference, orin other words, the pressure of the refrigerant in the second chamber isthe same as the pressure of the communication portion or the pressurechange is small; in the second case, the third flow passage 500 includesthe communication portion 520 and the throttle portion 510, therefrigerant in the second chamber 200 enters the communication portionafter being secondary throttled and depressurized by the throttleportion 510, the refrigerant after being secondary throttled anddepressurized enters the second heat exchanger 50, which improves theabsorption performance of the refrigerant in the second heat exchanger50, and is further beneficial to improving the heating performance ofthe first heat exchanger 20.

Referring to FIG. 37 and FIG. 39, in the second heating mode of thethermal management system, the first valve core 5000 is in the thirdoperation position, that is, the throttle passage 5100 communicates thefirst chamber 100 with the fourth flow passage 600. The refrigerant withhigh-temperature and high-pressure releases heat in the first heatexchanger 20, the refrigerant which releases heat in the first heatexchanger 20 enters the first flow passage 300 through the firstconnecting port 1, and enters the first chamber 100 through the firstflow passage 300. Due to the throttling of the throttle passage 5100,the relatively liquid refrigerant enters the first port of the secondheat exchanger 50 through the fourth flow passage 600 and the thirdconnecting port 3, the refrigerant evaporates and absorbs heat in thesecond heat exchanger 50, and the refrigerant which has absorbed heatenters the first inlet 42 of the compressor or enters the first inlet 42of the compressor via the gas-liquid separator 80.

Referring to FIG. 36 and FIG. 42, in the third heating mode of thethermal management system, the first valve core 5000 is in the fourthoperation position, that is, the conduction passage 5200 communicatesthe first chamber 100 with the second chamber 200. The refrigerant withhigh-temperature and high-pressure releases heat in the first heatexchanger 20, the refrigerant which releases heat in the first heatexchanger 20 enters the first flow passage 300 through the firstconnecting port 1, and enters the first chamber 100 through the firstflow passage 300, the refrigerant arranged in the first chamber 100enters the second chamber 200 through the conduction passage 5200, therefrigerant passing through the second chamber is gas-liquid separated,the gaseous refrigerant enters the second inlet 43 of the compressorthrough the second flow passage and is involved in the next circle, theliquid refrigerant enters the first port of the second heat exchanger 50through the third flow passage and the third connecting port 3, therefrigerant evaporates and absorbs het in the second heat exchanger 50,and the refrigerant which has absorbs heat enters the first inlet 42 ofthe compressor or enters the first inlet 42 of the compressor via thegas-liquid separator 80. It should be emphasized here that the thirdheating mode includes the following two cases: in the first case, thethird flow passage 500 only includes the communication portion 520, thatis, the third flow passage only has a function of communicating, therefrigerant in the second chamber 200 enters the second heat exchanger50 and releases heat in the second heat exchanger 50. At this time, thethird heating mode is applied to a case of the defrosting of the secondheat exchanger 50; in the second case, the third flow passage 500includes the communication portion 520 and the throttle portion 510, therefrigerant in the second chamber 200 enters the communication portionafter being throttled and depressurized by the throttle portion 510, therefrigerant after being throttled and depressurized enters the secondheat exchanger 50, and the refrigerant absorbs heat in the second heatexchanger 50. At this time, the third heating mode is applied to a casewhere the demanding for heating by the first heat exchanger 20 is nothigh.

Referring to FIG. 35 and FIG. 40, in the cooling mode of the thermalmanagement system, the first valve core 5000 is in the first operationposition, that is, the conduction passage 5200 communicates the firstchamber 100 with the fourth flow passage 600. The temperature flap isclosed, the first heat exchanger 20 performs a small amount of heatexchange or no heat exchange, the refrigerant enters the first flowpassage 300 through the first connecting port 1, and enters the firstchamber 100 through the first flow passage 300, the refrigerant arrangedin the first chamber 100 enters the fourth flow passage through theconduction passage 5200, and then enters the second heat exchanger 50through the third connecting port 3. The refrigerant withhigh-temperature and high-pressure releases heat in the second heatexchanger 50, the throttling unit 70 is switched on, the refrigerantenters the third heat exchanger 30 after being throttled by thethrottling unit 70, the relatively liquid refrigerant absorbs heat inthe second heat exchanger 50 for reducing the temperature in theair-conditioning case, and the refrigerant which has absorbs heat entersthe first inlet 42 of the compressor or enters the first inlet 42 of thecompressor via the gas-liquid separator 80, and participates in the nextcircle.

In other embodiments of the thermal management system, referring to FIG.32, compared with the first embodiment of the thermal management system,the thermal management system does not include the third heat exchanger30, the second port of the second heat exchanger 50 is only incommunication with the first inlet 42 of the compressor or with thefirst inlet 42 of the compressor via the gas-liquid separator 80. It canbe known that, in this embodiment, the thermal management system onlyhas a heating mode, and does not have a cooling mode. It should be notedthat the thermal management systems with above two forms are taken as anexample and do not limit the concept of the present application. Theheating modes in some thermal management systems are the same with orequivalent to the above heating mode, which should belong to theprotection scope of the present application.

It should be noted that the above embodiments are only used toillustrate the present application, and not to limit the technicalsolution described according to the present application, such as thedefinition of directionality such as “front”, “rear”, “left”, “right”,“up” and “down”. This specification has described the presentapplication in detail with reference to the above embodiments, however,those skilled in the art should understand that they can still combine,modify or equivalently replace the present application, and alltechnical solutions and improvements that do not depart from the spiritand scope of the present application should be covered within the scopeclaimed by the claims of the present application.

What is claimed is:
 1. A fluid management assembly, comprising a valvebody and a first valve core, wherein the fluid management assemblyfurther comprises a first chamber and a second chamber, a wall formingthe second chamber comprises an inner wall of the valve body; the firstvalve core is arranged in the first chamber, the first valve core isrotatable in the first chamber, the first valve core is provided with aconduction passage, the fluid management assembly comprises a throttlechamber, and the throttle chamber or the conduction passage isconfigured to communicate the first chamber with the second chamber; andwherein the fluid management assembly comprises a first flow passage, asecond flow passage, a third flow passage and a fourth flow passage, thefirst flow passage, the second flow passage and the third flow passagehave openings in an outer wall of the valve body, the first flow passageis in communication with the first chamber, and the conduction passageor the throttle chamber is configured to communicate the fourth flowpassage with the first chamber; the second flow passage is incommunication with the second chamber, and the third flow passage isprovided with a first opening of the third flow passage in the wall ofthe second chamber.
 2. The fluid management assembly according to claim1, wherein the valve body comprises a first opening portion, a wall ofthe first chamber comprises a partial wall of the first opening portion;the valve body comprises a first passage, the first passage is providedwith a first opening of the first passage in the wall of the secondchamber, the first opening of the first passage is arranged above thefirst opening of the third flow passage, and the first passage isprovided with a second opening of the first passage on a bottom wall ofthe first opening portion.
 3. The fluid management assembly according toclaim 1, wherein the valve body comprises a second opening portion, thesecond opening portion has an opening in the outer wall of the valvebody, the third flow passage comprises a chamber formed by the secondopening portion, the chamber formed by the second opening portioncomprises a communication portion, and the communication portion isconfigured to be in communication with the first opening of the thirdflow passage.
 4. The fluid management assembly according to claim 3,wherein the second opening portion is provided with the first opening ofthe third flow passage in the wall of the second chamber; the third flowpassage comprises a throttle portion, the second opening portioncomprises a mounting portion and a wall of the throttle portion, themounting portion is arranged between the throttle portion and thecommunication portion, the fluid management assembly comprises a valvesupporting seat, and the valve supporting seat is relatively fixed tothe mounting portion; and the throttle portion is arranged between thefirst opening of the third flow passage and the communication portion,or the throttle portion is provided with the first opening of the thirdflow passage in the wall of the second chamber.
 5. The fluid managementassembly according to claim 3, wherein the valve body further comprisesa third opening portion and a second passage, the third opening portioncomprises a large-diameter portion, a small-diameter portion and a flatportion, the flat portion connects the large-diameter portion and thesmall-diameter portion, the small-diameter portion has an opening in awall of the communication portion, and the large-diameter portion has anopening in the outer wall of the valve body; the large-diameter portioncomprises a mounting portion, the fluid management assembly furthercomprises a valve chamber and a valve supporting seat, the valvesupporting seat is relatively fixed to the mounting portion, and a wallforming the valve chamber comprises a wall of the large-diameter portionand a wall of the valve supporting seat; and the second passage isprovided with the first opening of the third flow passage in the wall ofthe second chamber, and the second passage has an opening in the wall ofthe valve chamber.
 6. The fluid management assembly according to claim4, wherein the valve body comprises a main body and a block body, themain body comprises the first opening portion, the second openingportion and the first flow passage, and the first flow passage isprovided with an opening in an outer wall of the main body; the mainbody comprises a fourth opening portion, at least part of the block bodyis arranged in a chamber formed by the fourth opening portion, thefourth opening portion has a mounting wall, the block body has amatching wall, the mounting wall is fixedly connected to the matchingwall and a connection between the mounting wall and the matching wall issealed, the wall of the second chamber comprises a side wall of thefourth opening portion and an inner wall of the block body; the firstpassage of the valve body is provided with the first opening of thefirst passage in the side wall of the fourth opening portion, the innerwall of the block body is formed as a top wall of the second chamber,the second flow passage extends through the block body, a bottom wall ofthe fourth opening portion is formed as at least part of a bottom wallof the second chamber, and the third flow passage is provided with thefirst opening of the third flow passage in the side wall of the fourthopening portion and/or in the bottom wall of the fourth opening portion;or the inner wall of the block body is formed as the bottom wall of thesecond chamber, the second flow passage is formed in the main body, andthe third flow passage is provided with the first opening of the thirdflow passage in the side wall of the fourth opening portion and/or in abottom wall of the block body.
 7. The fluid management assemblyaccording to claim 4, wherein the valve body comprises a first valvebody and a second valve body, the first valve body comprises a firstwall, the second valve body comprises a second wall, the first wall isarranged in contact or with a gap to the second wall; the first valvebody is arranged above the second valve body, the first valve body isprovided with the first opening portion, the second flow passage, thefirst passage of the valve body and a top wall of the second chamber,the second valve body is provided with a bottom wall of the secondchamber, and the second opening portion is arranged on the second valvebody; and the second chamber comprises a first sub-chamber and a secondsub-chamber, the first valve body forms the first sub-chamber, thesecond valve body forms the second sub-chamber, an opening of the firstsub-chamber in the first wall is opposite to an opening of the secondsub-chamber in the second wall, the first opening of the first passageis arranged in a wall of the first sub-chamber, the first opening of thethird flow passage is arranged in a wall of the second sub-chamber; abottom wall of the second sub-chamber comprise a first bottom wall and asecond bottom wall, and the first bottom wall is closer to the firstsub-chamber relative to the second bottom wall.
 8. A fluid managementassembly, comprising a valve body and a first valve core, wherein thefluid management assembly comprises a first chamber and a secondchamber, the second chamber is formed in the valve body; the first valvecore is arranged in the first chamber, the first valve core is rotatablein the first chamber, wherein the fluid management assembly is providedwith a throttle chamber, and the first chamber is configured to be incommunication with the second chamber through the throttle chamber; andthe fluid management assembly comprises a first flow passage, a secondflow passage and a third flow passage, the first flow passage is incommunication with the first chamber; the second flow passage is incommunication with the second chamber; the third flow passage isprovided with a first opening of the third flow passage on a wall of thesecond chamber; the third flow passage comprises a communicationportion, the communication portion is provided with a second opening ofthe third flow passage in an outer wall of the valve body; the fluidmanagement assembly further comprises a throttle portion, and thethrottle portion is a part of the third flow passage.
 9. The fluidmanagement assembly according to claim 8, wherein the valve bodycomprises a first opening portion and a second opening portion, thesecond opening portion comprises a wall of the communication portion,the throttle portion is arranged between the first opening of the thirdflow passage and the communication portion, or the throttle portion isprovided with the first opening of the third flow passage on the wall ofthe second chamber.
 10. The fluid management assembly according to claim9, wherein the fluid management assembly comprises a second valve coreand a valve supporting seat, the second valve core is movable relativeto the valve supporting seat; the second opening portion comprises amounting portion and a wall of the throttle portion, the mountingportion is arranged between the throttle portion and the communicationportion, at least part of the valve supporting seat is arranged in achamber formed by the mounting portion, a connection between themounting portion and the valve supporting seat is sealed, the valvesupporting seat comprises a valve port portion, and the third flowpassage is blocked by the cooperation of the second valve core with thevalve port portion.
 11. The fluid management assembly according to claim4, wherein the fluid management assembly further comprises a valve portportion, a second valve core and the valve supporting seat; the valvebody comprises a third opening portion, the third opening portioncomprises a large-diameter portion, a small-diameter portion and a flatportion, the flat portion connects the large-diameter portion and thesmall-diameter portion, the small-diameter portion has an opening in aside wall of the communication portion, the large-diameter portioncomprises the mounting portion, at least part of the valve supportingseat is arranged in a chamber formed by the mounting portion, aconnection between the mounting portion and the valve supporting seat issealed; the fluid management assembly further comprises a valve chamber,and a wall forming the valve chamber comprises a wall of thelarge-diameter portion and a wall of the valve supporting seat; thethrottle portion is provided with the first opening of the third flowpassage in the wall of the second chamber, the throttle portion has anopening in the wall of the valve chamber, the throttle portion isconfigured to communicate the second chamber with the valve chamber; thefluid management assembly comprises a coil assembly, a moving iron core,and a static iron core, the moving iron core is movable relative to thestatic iron core, the second valve core is movable in the valve chamber,the valve port portion is formed as the flat portion or thesmall-diameter portion, and the second valve core is configured to closeor open the valve port portion; or the third flow passage comprises asecond passage, the second passage has openings both in the wall of thesecond chamber and in the wall of the valve chamber, the second passageis configured to communicate the second chamber and the valve chamber;the valve port portion is formed in the valve supporting seat or in aguiding portion of the second valve core, or the valve port portion isformed in the small-diameter portion, and a gap between the second valvecore and the valve port portion forms the throttle portion.
 12. Thefluid management assembly according to claim 2, wherein the fluidmanagement assembly comprises a valve seat, the valve seat has amatching surface corresponding to the first valve core; the throttlechamber is not in communication with the conduction passage, a wallforming the throttle chamber comprises a throttle groove, the throttlegroove is recessed relative to an outer wall of the first valve core,when the fluid management assembly is throttled, part of an opening ofthe throttle groove faces the matching surface; wherein the throttlegroove comprises a head end and a tail end, a first surface is defined,which is perpendicular to an axis of the first opening portion, whereinthe head end, the tail end and the matching surface have projections inthe first surface, and when the fluid management assembly is throttled,the projection of the tail end and the projection of the head end arearranged at two sides of the projection of the matching surface in aradial direction of the projection of the matching surface; or the wallforming the throttle chamber comprises a throttle orifice, the throttleorifice has two openings in the outer wall of the first valve core, andwhen the fluid management assembly is throttled, one opening of thethrottle orifice is in communication with the first chamber, and theother opening of the throttle orifice is in communication with a passageof the valve seat.
 13. The fluid management assembly according to claim12, wherein the throttle groove is recessed relative to the outer wallof the first valve core, the throttle groove comprises a first section,a second section and a third section, one of the second section and thethird section comprises the head end, the other one of the secondsection and the third section comprises the tail end, and when the fluidmanagement assembly is throttled, an opening of the first section facesthe matching surface, an opening of the second section faces the passageof the valve seat, and an opening of the third section faces the firstchamber.
 14. The fluid management assembly according to claim 13,wherein a bottom wall of the throttle groove comprises a first bottomwall and a second bottom wall, the first bottom wall is arrangedintersected with the second bottom wall, and wherein, in a movingdirection of the first valve core, a length of the opening of thethrottle groove is longer than a length of the first bottom wall, andthe length of the opening of the throttle groove is longer than a lengthof the second bottom wall; wherein an included angle between the lengthof the first bottom wall and the length of the second bottom wall isdefined as a first included angle, the first included angle is greaterthan or equal to 80 degrees and less than or equal to 160 degrees. 15.The fluid management assembly according to claim 14, wherein a wallforming the throttle groove comprises a first side wall and a secondside wall, the first side wall is arranged opposite to the second sidewall, the first bottom wall is arranged between the first side wall andthe second side wall, the second bottom wall is arranged between thefirst side wall and the second side wall, and wherein, in the movingdirection of the first valve core, the second bottom wall extends fromthe outer wall of the first valve core to the first bottom wall, and thefirst bottom wall extends from the second bottom wall to the outer wallof the first valve core; and the first side wall has a first side lineand a second side line, the first side line is also arranged in theouter wall of the first valve core, the second side line is alsoarranged in the first bottom wall, and a radial distance between thefirst side line and the second side line decreases in the movingdirection of the first valve core.
 16. The fluid management assemblyaccording to claim 1, wherein the valve body comprises a second openingportion, the second opening portion has an opening in the outer wall ofthe valve body, the third flow passage comprises a chamber formed by thesecond opening portion, the chamber formed by the second opening portioncomprises a communication portion, and the communication portion isconfigured to be in communication with the first opening of the thirdflow passage.